Underground

We live on a thin skin. Beneath it are voids that water spent millions of years dissolving, shafts people sank looking for salt and gold and coal, cities carved out of soft rock by populations hiding from armies, and a biosphere of microbes that may outweigh everything walking around up here. Below all of that is a planet we have never seen and never will, the deepest hole ever drilled reached twelve kilometres and stopped, which is not quite a third of the way through the crust, let alone the six thousand to the centre. Everything we know about the inside of the Earth we learned by listening to earthquakes. The underground is also where the record is kept: it buried Pompeii and preserved it, held Tutankhamun for three thousand years, and kept the oldest art anyone has found on walls that no daylight ever reached. This archive goes down through all of it, the caves, the mines, the digs, the tunnels, the life, the descent, the deep earth, and the underworld people imagined long before they could measure any of it.

A chronological documentary of 647 moments spanning 4000 BC–2026 on Loreline.

Curated by Olivier · last updated 2026-08-22

1. c. 4000 BC - Flint in the Form of a Bird. (5000–2950 BCE), Naqada II–III (3650–3000 BCE), dated 4000–3000 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
2. c. 3800 BC - Seal Amulet in the form of a Lion's Head. 3800–3500 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
3. c. 3000 BC - Kandila (Collared Jar with Conical Foot). ), Greece, Cycladic, dated 3000–2950 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
4. c. 1980 BC - Sickle Blade. (2040–1648 BCE), Dynasty 12, dated 1980–1801 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
5. c. 1980 BC - Sickle Blades. (2040–1648 BCE), Dynasty 12, dated 1980–1801 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
6. c. 1918 BC - Coffin of Senbi (Lid). ), Egypt, Meir, Middle Kingdom (2040–1648 BCE), Dynasty 12, reign of Amenemhat II (1929–1895 BCE), reign of Senusret III (1878–1839 BCE), dated 1918–1859 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
7. c. 1540 BC - Fragment of a Necklace. (1540–1069 BCE), Dynasty 18, dated 1540–1296 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
8. c. 1069 BC - Amulet of Bastet. (1069–715 BCE), dated c. 1069–715 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
9. c. 1000 BC - Coffin of Bakenmut. (1069–715 BCE), Dynasties 21–22, dated c. 1000–900 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
10. c. 990 BC - Shawabty of Pinudjem I, High Priest of Amen and King. (1069–715 BCE), Dynasty 21, dated c. 990–969 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
11. c. 976 BC - Coffin of Nesykhonsu. (1069–715 BCE), Dynasties 21–22, dated c. 976–889 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
12. c. 664 BC - Amulet of a Crouching Bear. (715–332 BCE), dated 664–332 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
13. c. 664 BC - Canopic Jar with Jackal's Head (lid). ), Egypt, Late period (715–332 BCE), Dynasty 26, dated 664–525 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
14. c. 664 BC - Canopic Jar with Man's Head (lid). ), Egypt, Late period (715–332 BCE), Dynasty 26, dated 664–525 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
15. c. 664 BC - Canopic Jar with Baboon's Head (lid). ), Egypt, Late period (715–332 BCE), Dynasty 26, dated 664–525 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
16. c. 499 BC - Black-Gloss Oil Lamp. 400s BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
17. c. 360 BC - Shawabty of Nectanebo II. (715–332 BCE), Dynasty 30, reign of Nectanebo II (358–340 BCE), dated 360–342 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
18. c. 100 BC - Lamp. 100–1 BCE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
19. c. 60 BC - Oil Lamp. (c. 50 BCE, 50 CE), dated c. 50 BCE, 50 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
20. c. 50 BC - Cartonnage Mummy Case. (332 BCE, 395 CE), Ptolemaic dynasty (305–30 BCE), Roman empire (30 BCE, 395 CE), dated c. 50 BCE, 50 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
21. 0025 - Funerary Portrait of a Young Girl. 25–37 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
22. 0100 - Sarcophagus. 100–125 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
23. 0138 - Funerary Panel of a Man. (Egypt), unknown painter, dated about 138–92 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
24. 0138 - Funerary Portrait of a Woman. 138–92 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
25. 0200 - Relief Portrait Head of the Emperor Balbinus. 238 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
26. 0250 - Axe. 250–900 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
27. 0350 - Funerary Urn. 350–500 CE. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
28. 0600 - Eccentric Flint. (250-900), dated 600–900. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
29. 1000 - Animal-Headed Figure Pendant. 1000-1550, dated c. 1000–1550. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
30. 1200 - Funerary Mask. 13th-16th century, dated 1200–1500. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
31. 1200 - Funerary Female Figure. 15th-16th century, dated 1200–1500. Museum photograph of an excavated object; the date given is the object's, not the photograph's.
32. 1737-01-01 - Ancient Egyptian Mummies - Pomet's Drogues. Ancient Egyptian Mummies from Pierre Pomet's Histoire Générale des Drogues (1694) by Pierre Pomet [1658 - 1699] Compleat History of Druggs, a - translated 1737 https://archive.org/details/compleathist. Period photograph.
33. 1816 - Disposition des os dans les catacombes, 1816, D.16744. Auteur(s): Forbes, James (Londres, 1749 - 1819), dessinateur Date de production: En 1816 Type(s) d'objet(s): Dessin, Arts graphiques Dénomination(s): Dessin Dimensions - Oeuvre: Hauteur: 21.4 cm Larg.
34. 1816 - Le puits, ou source de l’oubli, aux Catacombes, 1816. D.16748. Auteur(s): Forbes, James (Londres, 1749 - 1819), dessinateur Date de production: En 1816 Type(s) d'objet(s): Dessin, Arts graphiques Dénomination(s): Dessin Dimensions - Oeuvre: Hauteur: 15.4 cm Larg.
35. 1850-06-15 - Paris Catacombes 008. Besucher in den Katakomben von Paris, Zeichnung (Anfang des 19. Jahrhunderts). Period photograph.
36. 1855-02-10 - Pen and Pencil (newspaper), 10 February 1855 page 5. Pen and Pencil, Saturday, 10 February 1855, No. 1, Vol I., page 5 of 16, including illustrations. An illustration from Pen and Pencil (an illustrated Family Newspaper). The Sister of Charity. The Ca. Period photograph.
37. 1859-06-15 - Plate II- Topaz, Garnet, Vesuvian, Idocrase, Chrysolite, Olivine, Pistacite, Epidote, Turq. Figures 1-7. The Topaz. 1. Topaz 2. The same [Topaz] 3. Dark Yellow Topaz 4. Sea-green Topaz or Aquamarine 5. Light Yellow Topaz 6. Dark Yellow Topaz 7. The same [Dark Yellow Topaz] Figures 8-19. The. Period photograph.
38. 1859-06-15 - Plate XII- Sulphur, Honey-Stone, Graphite, Coal, Lignite - - f8bf61b7c988972178384f3d01ded. Figures 1-3. Sulphur. 1. Native Sulphur 2. The same [Native Sulphur] 3. The same [Native Sulphur] Figure 4. Honey-Stone. 4. Honey-Stone or Mellite Figures 5-7. Graphite. 5. Graphite Plumbago 6. Clear. Period photograph.
39. 1862-06-15 - Catacombes - Fontaine de la Samaritaine - estampe - APMartial (Potémont) - btv1b84574460. Sujet: Puits Paris (France) -- Catacombes Paysages -- 19e siècle Collection: [Ancien Paris]; 271 Collection: [Ancien Paris]; 271 Éditeur: [Cadart et Luquet; Potémont] (Paris). Period photograph.
40. 1863 - Lantern Slide Earthworm -- Larder - John H Crabtree - 118 1934 48. This photographic slide shows a feature in the soil and is entitled ‘Earthworm - larder’. The slide was part of the collection belonging to John Crabtree and is within a set of slides of nature and bi. Period photograph.
41. 1874 - The Quarterly journal of the Geological Society of London. W. TOPLET OK AREAS OF APPARENT UPHEAVAL. 189 these rocks would he affected by this amount, besides that resulting from the thinning of the higher Secondary rocks themselves. We see, then, that in esti. Period photograph.
42. 1893 - Vue d'une des parois d'une galerie de l'Ossuaire des Catacombes, 1893, PH10012. Auteur(s): Anonyme, photographe Autre titre: Galerie de l'Ossuaire, Catacombes, 14ème arrondissement, Paris. (Titre factice) Date de production: En 1893 Type(s) d'objet(s): Photographie, Arts graphiqu.
43. 1897 - George Carnac, miner. Title: George Carnac, miner Abstract/medium: 1 photographic print. Period photograph.
44. 1900-06-15 - A power drill at the Echo Mining Company mine, Mojave Mining District, ca.1900 (CHS. A power drill at the Echo Mining Company mine, Mojave Mining District, ca.1900 Photograph of a power drill in operation at the Echo Mining Company mine, Mojave Mining District. Dust is generated at ri. Period photograph.
45. 1900-06-15 - E.M. Hamilton, discoverer of Willow Springs Mine near Rosamond, Antelope Valley, at the mi. 1900 Photograph of miner E.M. Hamilton, discoverer of Willow Springs Mine near Rosamond, Antelope Valle. Period photograph.
46. 1900-06-15 - Group of prospectors on the Colorado River in Glen Canyon up from Lee's Ferry, Grand Canyo. 1900 Photograph of a group of five prospectors on the Colorado River in Glen Canyon up from Lee's Ferry. Period photograph.
47. 1900-06-15 - Interior view of mine and miners in the Mohawk Mine, Goldfield, Nevada, ca.1900. 1905 Photograph of the interior view of mine, miners and $80,000 to the ton in gold sitting on the ledge in the Mohawk M. Period photograph.
48. 1900 - Mass portrait, Congo, ca. 1900. 1915 Black and white lantern slide showing a portrait of many men, women and children posed what may be a hill up to a mine-shaft in colonial Belgian Congo (present day. Period photograph.
49. 1901-02-01 - Derby Mine, Mill & Camp, Thumb Butte Prescott. Millsite and Camp, Derby Mine, Prescott Arizona -Thumb Butte Mining District, George U. Young. Period photograph.
50. 1905-01-01 - Derby Mine George Young Highland Pines Prescott. Miners in Thumb Butte Mining District, George U. Young of Derby Mines, Prescott, Yavapai County, Arizona Territory. Period photograph.
51. 1905 - File-A0305-2--Main Line Scranton Division--Nay Aug Tunnel--East End. A0305-2--Main Line Scranton Division--Nay Aug Tunnel--East End [1905.12.11] Keywords: tunnel; Railroads; (NPS Focus Subject Thesaurus). Period photograph.
52. 1905 - File-A0017--Old mine opening -?. A0017--Old mine opening [?] [1905.03.09] Keywords: Anthracite industry; (NPS Focus Subject Thesaurus); Mining. Period photograph.
53. 1905 - File-A0018--Old mine opening -?. A0018--Old mine opening [?] [1905.03.09] Keywords: snow; abandonned; Anthracite industry; (NPS Focus Subject Thesaurus); Mining. Period photograph.
54. 1906 - File-A0310-A0314--Main Line Scranton Division--Nay Aug Tunnel. A0313 Concrete Arch West Keywords: tunnel; retaining wall; Railroads; (NPS Focus Subject Thesaurus). Period photograph.
55. 1909 - Coal wagons waiting in line 6 blocks long to get coal at one of the largest coal yards in. Title: Coal wagons waiting in line 6 blocks long to get coal at one of the largest coal yards in Chicago... Abstract/medium: 1 photographic print. Period photograph.
56. 1910-06-15 - Italian and African-American Clay Miners in Mine Shaft. Title: Italian and African-American Clay Miners in Mine Shaft. Period photograph.
57. 1911 - Vecsembükki expedíció 002 képeslap 1911 B.I.G. Members of Vecsembükk expedition in 1911 (Hungary). Period photograph.
58. 1911 - Vecsembükki expedíció Bekey Imre Gábor 1911. Photograph showing vecsembükki expedíció bekey imre gábor 1911. Period photograph.
59. 1911 - Lewis Hine, Jim McNulty, 15 years old, miner, North Pittston, Pennsylvania, 1911. Jim McNulty, 10 Morgan St. Is a leader inside the mine at Leadville Shaft. Said he was 15 years old. Location: North Pittston, Pennsylvania. Photograph by Lewis Wickes Hine, January 1911. [PD] This p. Period photograph.
60. 1914 - 1914 Fortepan 62768. Photograph showing 1914 fortepan 62768. Period photograph.
61. 1915 - Company buildings. Lovett, Alberta, ca. 1915. From the Godby Family fonds, PR2009.0441/15. Period photograph.
62. 1915 - Company houses. Mining company houses set up on clear-cut land. Lovett, Alberta, ca. 1915. From the Godby Family fonds, PR2009.0441/15. Period photograph.
63. 1915 - Company houses and store. Mining company houses and store on clear-cut land. Lovett, Alberta, ca. 1915. From the Godby Family fonds, PR2009.0441/15. Period photograph.
64. 1922 - Coal executives, 7-31-22. Title: Coal executives, 7/31/22 Abstract/medium: 1 negative: glass; 5 x 7 in. or smaller. Period photograph.
65. 1922 - Tutankhamen's Tomb (1922). British Pathe newsreel shot at the Valley of the Kings showing the gated entrance to the tomb in the year of its discovery.
66. 1923 - Coal mining. Title: Coal mining Abstract/medium: National Photo Company Collection (Library of Congress) Physical description: 1 negative:. Period photograph.
67. 1927 - Groep gemummificeerde lijken, mummies op Luçon op de Filipijnen, SFA022815205. Omschrijving: Groep gemummificeerde lijken / mummies op Luçon op de Filipijnen. De doden worden daar bij elkaar gezet op een heilige plek in de bergen, waar ze door de zon verdrogen en mummificeren. 1. Period photograph.
68. 1933 - Tinstone: how it is obtained in a Cornish mine (1933). British Pathe newsreel showing black tin ore raised from a Cornish mine and put through its first crushing.
69. 1934 - Bethel excavations matpc.16401. Title: Bethel excavations Abstract/medium: G. Eric and Edith Matson Photograph Collection Physical description: 1 negative:. Period photograph.
70. 1939 - The Sutton Hoo ship burial: 1939 excavation footage. Archive film of the 1939 dig at Sutton Hoo in Suffolk, showing the ship's imprint emerging from the sand.
71. 1948 - The Cornish engine (1948). Shell's 1948 documentary on the Cornish pumping engines, in their day the most powerful and economical steam pumps in the world, which kept the tin mines dry.
72. 1950-06-15 - Reproductions of cave paintings in the Altamira Cave, Spain, from the Illustrated London N. Title: Reproductions of cave paintings in the Altamira Cave, Spain, from the Illustrated London News, Aug. 17, 1912 Abstract/medium: G. Eric and Edith Matson Photograph Collection Physical description.
73. 1950-06-15 - Coal Miners. Title: Coal Miners Abstract/medium: 1 negative: glass; 5 x 7 in. or smaller.
74. 1952 - Lascaux: Cradle of Man's Art (1952). An early documentary filmed when Lascaux was still open, twelve years after its discovery.
75. 1957-06-15 - Kulutusosuuskuntien Keskusliiton kokoelma D1974 7486H. Otanmäen kaivoksen työntekijöitä. Alkuperäinen kuvateksti: "Jämeriä 'mainareita' kaivoskuilun edustalla. Vasemmalta työnjohtaja Sulo Orvassaari, huoltomies Matti Lankinen ja konelastaaja Toivo Ohvanai.
76. 1961 - Project Mohole: Drilling for the Mantle. Period film documenting Project Mohole, the American attempt to drill through the ocean crust to the Mohorovicic discontinuity as an Earth-science answer to the Space Race.
77. 1966 - Aberfan: valley of sorrow (1966). British Pathe newsreel filmed at Aberfan after a colliery spoil tip slid onto Pantglas Junior School and part of the village on 21 October 1966.
78. 1966 - Cornish tin mining at Camborne (1966). Newsreel following miners into the cage at Camborne, then through the winding gear and ore dressing floors above ground.
79. 1970 - How Plate Tectonics Was Discovered. A 1970 documentary laying out the evidence that convinced geologists to adopt plate tectonics as the unifying theory of Earth.
80. 1970-10-28 - Britain: revival of tin mining (1970). Agency newsreel on the attempted revival of Cornish tin mining, an industry killed less by exhausted lodes than by the tin price slump of 1890 and the Depression.
81. 1974 - American strip mining in Appalachia (1974). Thames Television report on twenty-five years of strip mining across the Appalachian mountains, with whole mountainsides blasted for thin coal seams.
82. 1985-01-17 - Waverly Person, USGS seismologist. Waverly Person, who for decades headed the US Geological Survey's National Earthquake Information Center and became the public voice explaining earthquakes detected from deep within the Earth.
83. 1989 - SeismographLomaPreitaQuakeSeismologistSmile. Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Seismographs at the U.S. Geological Survey record the north-south horizontal, east-west horizontal, and vertical components of the ear.
84. 1990 - South Korean counter-tunnel. A West German engineer inspects a tunnel boring machine inside a South Korean counter-tunnel constructed to eliminate the value of North Korean tunnel No. 4 by intersecting it. Both tunnels are locate.
85. 1995 - Gaping Gill: a hundred years of exploration. A 1995 film marking the centenary of Martel's first descent of Gaping Gill in Yorkshire, with Bradford Pothole Club members in period dress.
86. 1998-03-06 - Cornwall's last tin mine closes, 1998. BBC Spotlight report filmed underground at South Crofty near Camborne on 6 March 1998, its final day of production.
87. 2000 - Panel of simple figures with boomerangs - Google Art Project. Photograph showing panel of simple figures with boomerangs - google art project.
88. 2000-09-07 - 14 644 Grotta di Nettuno, Höhlensee. Kurz nach dem Eingang, der Höhlensee ist mit dem Meer verbunden. Von rechts fällt durch den Höhleneingang Tageslicht ein.
89. 2008-01-31 - Seismic Imaging of the Earth's Interior. Barbara Romanowicz on using seismic tomography to map the deep structure and dynamics of the planet.
90. 2008-05-20 - Aven Armand 6. Aven Armand cave. Pictures were taken without flash, and the lighting is the one which can be seen today by any visitor. The first picture features the grande stalagmite, the highest known stalagmite.
91. 2008-07-06 - Bronsalderslik. Borum Eshøj Man of the Nordic Bronze Age at National Museum of Copenhagen, Denmark.
92. 2008-08-08 - Momie Xom Cai. Momie de Xom Cai, Vietnam's History Museum in Ho Chi Minh City.
93. 2008-09-06 - GiedraitisMerkelis2. Varniai church, Mummie of Simonas Mykolas Giedraitis, Lithuania.
94. 2008-10-24 - The Cicada Life Cycle. David Attenborough narrates the cicada's years underground feeding on root sap before a synchronised mass emergence.
95. 2008-11-12 - Kiger Gorge in the Steens Mountain country. Description/Notes: Kiger Gorge is the only example of glaciation in southeastern Oregon as seen from Rim Rock, far above the floor of the U-shaped valley. Photo is number 3819. Original Collection: Ed.
96. 2008-12-29 - The Terracotta Warriors. National Geographic's short account of the chance discovery of the buried army built to protect China's first emperor.
97. 2009-02-12 - Mammoth Cave Nat Park banner. "Stalactites and stalagmites inside Mammoth Cave, formed by dripping water.".
98. 2009-05-02 - Earthworms are vital to soil health because they transport nutrients and minerals from bel. This image or file is a work of a United States Department of Agriculture employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in t.
99. 2009-05-22 - Altamira, bison, museum. Bison from the model of the ceiling of Altamira, in the Brno museum Anthropos. Modern photograph of an ancient site.
100. 2009-05-22 - Altamira, bison, museum 02. Bison from the model of the ceiling of Altamira, in the Brno museum Anthropos. Modern photograph of an ancient site.
101. 2009-07-30 - Geologic Carbon Sequestration: Injecting CO2 Underground. A Berkeley Lab public lecture on capturing, compressing and storing carbon dioxide in geological formations.
102. 2009-09-08 - The Dikteon Cave, Crete. The Dikteon Cave on Crete, a limestone cave used as a cult site from the Minoan period and known in Greek myth as a birthplace of Zeus.
103. 2009-11-20 - Cave exploration in Borneo. BBC's Expedition Borneo team splits between separate caves in search of bats and snakes.
104. 2009-12-14 - ORL 33 tab 06 pic 02 Anlegestelle. Photograph showing orl 33 tab 06 pic 02 anlegestelle. Modern photograph of an ancient site.
105. 2010-02-13 - 200 - Grotte de Carlsbad - Février 2010. Panorama of a part of the Big Room cave chamber in Carlsbad Caverns, New Mexico, United States.
106. 2010-04-24 - MTS Perforator Tunnelbohrmaschine. 2010 in München.
107. 2010-05-15 - Han Earthquake-detecting Machine Model - 2. Henan Provincial Museum, Zhengzhou. Complete indexed photo collection at WorldHistoryPics.com.
108. 2010-06-03 - Wieliczka salt mine (UNESCO). UNESCO record of the Wieliczka-Bochnia rock salt deposit, mined since the thirteenth century and holding 300km of galleries over nine levels.
109. 2010-06-04 - A cave rescue rope pickoff demonstrated. Phil of British Columbia Cave Rescue demonstrates a single rope technique pickoff, the manoeuvre used to reach a casualty stranded on a rope.
110. 2010 - Soil Survey. A worm on a sample from the Btg horizon of a Ciales soil in El Yunque National Forest, PR. Macro-organisms, such as this earthworm, can dramatically alter soil structure, water movement, nutrient dyna.
111. 2010 - Cave paintings at Ana Kai Tangata
112. 2010-06-30 - Ice Cave - Southern Alps. Original Collection: Visual Instruction Department Lantern Slides Item Number: P217:set 039 054 You can find this image by searching for the item number by clicking here. Want more? You can find more.
113. 2010-08-27 - Video tour of the trapped Chilean miners' refuge. Footage released in August 2010 showing the 33 men and the shelter where they were confined after the San Jose copper mine collapsed three weeks earlier.
114. 2010-10-12 - The first Chilean miner is rescued. Florencio Avalos steps from the rescue capsule as the operation to lift the 33 men from the San Jose mine begins.
115. 2010-10-13 - The last trapped Chilean miner is rescued. Raw agency footage of 13 October 2010, when the last of the 33 men was raised, ending the longest underground entrapment on record.
116. 2011-02-19 - Ancient cave - home in Horvat Anim. Surrounding the synagogue there was a village comprised of caves used as homes in the 3-4 C CE. Modern photograph of an ancient site.
117. 2011-02-24 - FDT rue Saint-Jacques. Inscription "FDT" on the wall of a restaurant 163bis rue Saint-Jacques, Paris 5th arr. FDT = Fief Des Tombes (=Fief of the graves) is the former name of Catacombes. Modern photograph of an ancient site.
118. 2011-03-30 - Inside the BGS Seismology Lab. Dr Brian Baptie introduces the British Geological Survey's earthquake monitoring work from the Edinburgh seismology laboratory.
119. 2011-05-06 - Cave in Rugova Mountain. Great Cave in Rugova Gorge is a rare beauty of the underground terrains in Kosovo. It is estimated that this cave is one of the most attractive natural objects for the conduction of research and touri.
120. 2011-05-10 - Werner Herzog on Cave of Forgotten Dreams. The director on filming inside Chauvet, one of the few outsiders granted access to the sealed cave.
121. 2011 - Nz glowworm. Glowworm (Arachnocampa luminosa) in a cave in New Zealand.
122. 2011-07-26 - Unearthing the Wood-Wide Web. The Open University on where fungi live in soil and how the plant-fungus network was first investigated.
123. 2011-08-01 - Cradle of Gold: Hiram Bingham and Machu Picchu. Historian Christopher Heaney on Bingham's 1911 expedition and the dispute over the artefacts he removed.
124. 2011-08-24 - Estación sísmica en Timanfaya- Lanzarote- Illas Canarias- Spain-T16. Seismometer, Natural Park of Timamfaya, Lanzarote, Spain.
125. 2011-11-17 - The Cu Chi tunnel system. A look at the layered tunnel network used against American forces during the Vietnam War.
126. 2012-03-14 - Bat white-nose syndrome: a new fungus among us. USGS lecture by Dr David Blehert on the disease first found in a New York cave in 2007, which by 2012 had killed more than five million hibernating bats.
127. 2012-04-11 - Shale Gas, Hydraulic Fracturing and Induced Earthquakes. A USGS public lecture separating the evidence on injection-induced seismicity from the surrounding noise.
128. 2012 - A geoscientist intern at Mammoth Cave. A National Park Service photograph of a Geoscientists-in-the-Parks intern at Mammoth Cave National Park, Kentucky, the longest known cave system in the world.
129. 2012-06-29 - Induced Seismicity and Shale Gas. Professor Peter Styles of Keele University addresses the Geological Society on earthquakes caused by fracking.
130. 2012-08-13 - John Thomas Hollings. This mug shot comes from a police identification book believed to be from the 1930s. It was originally found in a junk shop by a member of the public and subsequently donated to Tyne & Wear Archives &.
131. 2012-09-29 - Balve-Reckenhoehle 10. Balve, Reckenhöhle, Detail der Kalksteinformationen, Stalaktiten, Münzen von Besuchern hinterlassen.
132. 2012-10-08 - Guillermo de Anda: caves of the Maya dead. The underwater archaeologist describes diving remote flooded caves and cenotes in Mexico for traces of Maya ritual use.
133. 2012-11-26 - 12.11.26 TBM breaking out. מכונת TBM פורצת החוצה ממנהרה מספר 1 בקו הרכבת המהיר לירושלים.
134. 2013-02-04 - Richard III skeleton confirmed authentic. Channel 4 News reports the identification of the Leicester car-park skeleton in February 2013.
135. 2013-02-06 - Richard III: the scientific outcome. The full 4 February 2013 press conference presenting the DNA, radiocarbon and osteological evidence.
136. 2013-02-19 - Faces of Earth: Shaping the Planet. Episode two of the American Geosciences Institute series, going inside tectonic events as earthquakes and volcanoes remake the surface.
137. 2013-02-27 - Cave interior: Natural cave habitat. A public-domain photograph of a cave interior showing natural cave habitat.
138. 2013-02-27 - Cave interior: Flowing water with low ceiling and many small stalactites. A public-domain photograph of a cave interior showing flowing water with low ceiling and many small stalactites.
139. 2013-02-27 - Cave interior: Waterway with arched ceiling and flowing water in channel. A public-domain photograph of a cave interior showing waterway with arched ceiling and flowing water in channel.
140. 2013-03-05 - The science of sinkholes. USGS geologist Randall Orndorff on how dissolution of soluble rock creates the voids that later collapse into sinkholes.
141. 2013-04-16 - The Waitomo caves. Science explainer on the New Zealand cave system where glowworms emit a blue-green light across the roof.
142. 2013-05-10 - Interior of Bet Debre Sina (Bet Mikael) Rock-Hewn Church - Lalibela - Ethiopia - 01
143. 2013-05-10 - Detail of Door of Bet Debre Sina (Bet Mikael) Rock-Hewn Church - Lalibela - Ethiopia - 01
144. 2013-05-12 - Christian Symbols in Bet Debre Sina Rock-Hewn Church - Lalibela - Ethiopia
145. 2013-05-12 - Interior of Bet Giyorgis Rock-Hewn Church - Lalibela - Ethiopia
146. 2013-05-12 - Detail of Facade of Bet Giyorgis Rock-Hewn Church - Lalibela - Ethiopia - 01
147. 2013-05-24 - Altamira and the Palaeolithic cave art of northern Spain. UNESCO on the seventeen decorated caves inscribed alongside Altamira, listed in 1985.
148. 2013-06-10 - Seismology 101. Caltech's short primer on how seismologists read the waves that pass through the planet.
149. 2013-06-22 - Mary Beard: Pompeii - Life and Death in a Roman Town. Classicist Mary Beard's BBC documentary reconstructs everyday Roman life from the evidence buried by Vesuvius.
150. 2013-07-01 - Earthworm Invaders. Smithsonian ecologist Melissa McCormick on how most earthworms in US soils are non-native and are reshaping American forests.
151. 2013-07-10 - Soybean field soil structure, black and white. CAPTION: The soil structure in Bill Nelson’s fields in Lake County, S.D., has organic matter (dark, rich color) and live roots extending way down,” says NRCS Conservation Agronomist Eric Barsness, Bro.
152. 2013-07-10 - Soybean Field with Healthy Soil. CAPTION: The soil structure in Bill Nelson’s fields in Lake County, S.D., U.S.A, has organic matter (dark, rich color) and live roots extending way down,” says NRCS Conservation Agronomist Eric Barsne.
153. 2013-07-11 - Acelerógrafo del Laboratorio de Ingenería Sísmica de la Universidad de Costa Rica
154. 2013-07-12 - Treasures from the Royal Tombs of Ur. The Penn Museum on the objects Leonard Woolley recovered from the Sumerian royal cemetery in the 1920s.
155. 2013-07-12 - General Seismology. Goran Ekstrom's long-form lecture on seismology as the discipline that reads Earth's interior.
156. 2013-08-19 - Copper mining and smelting at Bingham Canyon. Mid-twentieth-century industrial film showing how ore was won and processed at the Bingham Canyon copper mine in Utah.
157. 2013-09-27 - Martel's first exploration of the Gouffre de Padirac, 1889. Extract from Bernd Kliebhan's Arte film on Edouard-Alfred Martel's underground explorations, covering his 1889 descent into Padirac.
158. 2013-10-14 - Senghenydd colliery disaster: 100 years on. Channel 4 News reports from Senghenydd in south Wales, where 439 men died in 1913 in Britain's worst mining disaster.
159. 2014-03-26 - Yes, Yellowstone Is a Volcano. The Scientist-in-Charge of the Yellowstone Volcano Observatory explains how the volcanic system beneath the park is known and monitored.
160. 2014-04-02 - What Is Groundwater?. KQED's animated primer on where groundwater sits underground, where it comes from and where it goes.
161. 2014-04-10 - A Close-Up of the Creatures Living Beneath the Soil. BBC microphotography of the mites, springtails and worms in a handful of soil.
162. 2014-04-17 - Tesoro 2014-04-17 17-12-14. Cueva del Tesoro Karst en Yeso de Sorbas Sorbas (Almería).
163. 2014-04-17 - Tesoro 2014-04-17 17-09-14. Cueva del Tesoro Karst en Yeso de Sorbas Sorbas (Almería).
164. 2014-04-24 - What does healthy soil look like? Photos from Davison County, SD photo 1 of 2. Heidi Rients, District Conservationist with the USDA Natural Resources Conservation Service (NRCS), Mitchell, SD serving Davison and Hanson Counties, was on a field visit April 24, 2014. Heidi and Soi.
165. 2014-05-01 - Samizdat, civil disobedience and the Helsinki process. Gabor Demszky at the Library of Congress on the underground press and the subculture around it.
166. 2014-05-05 - What the Deepest Hole in the World Taught Us. SciShow explains who drilled the Kola borehole, why, and what the rock cores actually revealed about the crust.
167. 2014-06-12 - Konglomerathöhle Rohrendorf PLDC0113. This media shows the natural monument in Lower Austria with the ID KR-069.
168. 2014-06-19 - Earthworm in a No-till Field near Brookings, SD. Photo shows an earthworm on the soil surface in a no-till field near Brookings, SD. The soil is in good condition although several heavy rains during June 2014 had saturated the field which the farmer.
169. 2014-06-24 - CMG-40T Triaxial Broadband Seismometer. Triaxial Broadband Seismometer model CMG-40T by Güralp Systems Limited at Weston Observatory in Massachusetts, USA.
170. 2014-06-24 - Instruments for Students at Weston Observatory. Seismometer and other instruments for science education and public outreach.
171. 2014-09-26 - Robert Christiansen on Half a Century of Yellowstone Geology. The USGS emeritus geologist whose mapping revealed the scale of the Yellowstone caldera describes his career from the 1960s onward.
172. 2014-10-06 - The Catacomb of Priscilla, Rome. Smarthistory reads the painting programme of a late 2nd to 4th century Christian catacomb.
173. 2014-10-29 - Europe's oldest known cave paintings. Brian Cox visits the earliest dated painted caves in Europe for Human Universe.
174. 2014-11-03 - Mexico's giant crystal cave explained. How the chemistry of the Naica cave produced the world's largest crystals in an environment survivable only for minutes.
175. 2014-11-29 - Big Four Ice Caves. Mt. Baker-Snoqualmie National Forest, North Cascade Mountains, Washing. A hiker scrambles near the waterfall at the far end of the Big Four ice caves. Please note that the Forest Service strongly discourages or bars hikers from entering the caves due to the ever-present h.
176. 2015-02-04 - Disappearing ground: karst, sinkholes and caves. Museum lecture by Arkansas master naturalist Denis Dean on the karst underground of the Ozarks, recorded January 2015.
177. 2015-02-07 - The Layers of the Earth and Who Found Them. IRIS on how crust, mantle and core were each identified, and the difference between crust and tectonic plate.
178. 2015-02-16 - Marion Steam Shovel Co.. Persistent URL: contentdm.lib.miamioh.edu/cdm/compoundobject/collection/p... Subject: machinery industry; industrial facilities; factories; steam shovels; Ohio--Marion; miami digital collections; bowd.
179. 2015-02-16 - Marion Steam Shovel Co. Plant. Persistent URL: contentdm.lib.miamioh.edu/cdm/compoundobject/collection/p... Subject: machinery industry; industrial facilities; factories; steam shovels; Ohio--Marion; miami digital collections; bowd.
180. 2015-03-06 - The moment the remains were found. Archaeologist Mathew Morris uncovers a human leg bone on day one of the Leicester dig.

…347 further moments continue the chronology here. Full text archive: /loreline-text/underground.md

528. 2025-02-28 - The cult of Mithras and London's lost temple. The London Mithraeum and the underground initiatory cult that met in windowless rooms across the Roman empire.
529. 2025-03-01 - Geothermal Energy Is Changing. Real Engineering on Quaise Energy's millimetre-wave drilling, an attempt to reach supercritical geothermal resource depths that conventional bits cannot.
530. 2025-03-10 - Harriet Tubman: Visions of Freedom. PBS on the woman who returned repeatedly into slave territory along the Underground Railroad.
531. 2025-03-11 - The Graveyard at the Center of the Earth. PBS Eons on the slabs of subducted ocean floor that sink to the core-mantle boundary and pile up there.
532. 2025-03-11 - Sanxingdui: the discovery that rewrote Chinese history. An evidence-led account of the bronze masks, gold sceptres and jade from the Sichuan sacrificial pits.
533. 2025-03-12 - Inside the new excavations at Pompeii. NBC reports from the once-in-a-generation dig underway in the buried Roman city.
534. 2025-03-13 - Replicating Lascaux. The facsimile programme built to let visitors see the paintings while the original stays sealed against microbial damage.
535. 2025-03-16 - The geology of Carlsbad Caverns. How the Permian reef of the Guadalupe Mountains became the Carlsbad cave system, and how speleothems form inside it.
536. 2025-03-26 - Inside Son Doong: a cave with a forest, a river and clouds. Filmed expedition through Son Doong in Vietnam, which is large enough to hold its own jungle, watercourse and internal weather.
537. 2025-03-27 - Jay Famiglietti on GRACE and the Global Water Crisis. The former NASA JPL water scientist on how gravity satellites revealed the scale of groundwater depletion.
538. 2025-03-31 - Mammoth Cave: a way to wonder. Hour-long PBS documentary on Mammoth Cave National Park, the world's longest known cave system, from prehistoric Native American use onward.
539. 2025-04-02 - Chiremba Balancing Rocks - Harare3514. Prehistoric rock paintings depicting human and animal figures on a sandstone surface at Chiremba Balancing Rocks.
540. 2025-04-03 - The Big Business of Drilling Deep Into the Earth. Bloomberg on next-generation geothermal, where fracking technology is being repurposed to open sites previously off-limits.
541. 2025-04-06 - The salt mines of Wieliczka. A tour of the Wieliczka workings in the Carpathian foothills, with their salt lakes, caverns, chapels and carved figures.
542. 2025-04-12 - New discoveries in the Christian catacombs of Rome. A research update on the history, imagery and epigraphy of the Roman catacombs.
543. 2025-04-17 - The forest was full of cities we couldn't see. How airborne LiDAR changed archaeology, and where its results have been over-read.
544. 2025-04-23 - The Underground Network That Helps Forests Survive. NOVA on the mycelial networks beneath forests and how fungi move nutrients between trees.
545. 2025-05-04 - Caving expedition, Palawan 2025. Field footage from a 2025 caving expedition on Palawan in the Philippines.
546. 2025-05-04 - Intraterrestrials: Hunting Life Beneath the Surface. Microbiologist Karen Lloyd introduces her firsthand account of searching for the microbes that live inside the Earth's crust.
547. 2025-05-06 - Earthworm Ecology with Nick Henshue. A soil ecologist on what earthworms actually do to soil structure, and why the answer differs between a garden and a forest.
548. 2025-05-15 - Altamira and the controversy that rewrote history. How the Cantabrian cave's paintings were dismissed as forgery for decades before being accepted as Palaeolithic.
549. 2025-05-20 - Darwin's Unexpected Final Obsession. PBS Eons on the earthworm, the subject of Darwin's last book in 1881, and his argument that worms remake the soil of the whole land surface.
550. 2025-05-31 - The First Emperor's mega-tomb. Albert Lin uses remote sensing on the unexcavated burial mound of Qin Shi Huang, guarded by the Terracotta Army.
551. 2025-05-31 - The rock-hewn churches of Lalibela. The Met on the Ethiopian churches carved downward into volcanic rock rather than built up from it.
552. 2025-06-03 - Yellowstone's Magma Chamber: A Hot Mess. The Yellowstone Volcano Observatory's monthly update on what is actually known about the magma system heating the park's hydrothermal features.
553. 2025-06-04 - Thai cave rescue. NOVA follows the July 2018 operation in which international cave divers brought twelve boys and their football coach out of the flooded Tham Luang cave.
554. 2025-06-08 - Anclote river mound plaque. The information sign marking the location of an indigenous shell midden at the mouth of the Anclote River, in west-central Florida.
555. 2025-07-03 - Cascadia: Why the Risk Estimate Keeps Getting Worse. PBS Terra on newer research into the Cascadia megathrust and what it changes about the expected rupture.
556. 2025-07-05 - An Earthworm in its Natural Habitat at Kyabobo National Park. An earthworm moving across a damp, rich soil in the forest.
557. 2025-07-07 - Underground Connections: How Mycorrhizal Fungi Shape Ecosystems. A University of Sheffield researcher on the nutrient trade between plants and mycorrhizal fungi, and on what that partnership does and does not do.
558. 2025-07-08 - The greatest historical discoveries of 2024-2025. An evidence-based round-up of the year's finds and the reanalyses that changed accepted chronology.
559. 2025-07-08 - The history of the Mammoth Cave guides. On the enslaved Black cave guides who mapped much of Mammoth Cave's 400 known miles and made it one of America's earliest tourist attractions.
560. 2025-07-12 - Inside the world's first nuclear waste tomb. A visit to Onkalo, cut into Finnish bedrock to hold spent fuel permanently.
561. 2025-07-15 - The Four Most Ruthless Ants We've Ever Filmed. Deep Look's macro footage of fire ants, kidnapper ants, honeypot ants and Argentine ants, and the underground colonies they run.
562. 2025-07-20 - Secrets of Pompeii's Dead. National Geographic examines new excavation evidence from Pompeii and Herculaneum identifying victims of the AD 79 Vesuvius eruption.
563. 2025-07-24 - Polymetallic nodules: life-giver or energy future?. Filmmakers were mid-shoot on the seabed nodules when researchers announced in July 2024 that the rocks appeared to be producing oxygen in the abyss.
564. 2025-07-25 - What Is the Impact of Lithium Mining?. BBC News on lithium extraction from brine beneath Chile's Atacama and the water cost of pulling it up.
565. 2025-07-27 - Five discoveries from Pompeii's new excavations. A tour of finds from the ongoing Regio IX, Insula 10 excavation, filmed with access from the Pompeii Archaeological Park.
566. 2025-07-29 - The science behind giant sinkholes. BBC World Service on why the ground collapses without warning, and how karst dissolution sets the stage decades in advance.
567. 2025-08-10 - The oldest temple in the world. Palaeoanthropologist Ella Al-Shamahi visits Gobekli Tepe for the BBC.
568. 2025-08-13 - Calthemite formation on a wall at Most Holy Trinity Cemetery, Brooklyn, New York, US
569. 2025-08-17 - Budapest's Millennium Underground. Continental Europe's oldest metro line, opened in 1896, still running in its shallow cut-and-cover box.
570. 2025-08-18 - A Swedish Arctic town moves its church for the mine. Reuters on the two-day relocation of Kiruna's 113-year-old church to make way for expansion of the world's biggest underground iron ore mine.
571. 2025-08-19 - Kiruna church is moved before the mine swallows it. AP films the Kiruna Church and its belfry being hauled five kilometres east to the new town centre in August 2025.
572. 2025-08-28 - The lost tunnels of the Wieliczka salt mine. Beneath Wieliczka in southern Poland run more than 180 miles of workings, including chapels and a cathedral carved entirely from rock salt.
573. 2025-09-08 - The trillion-dollar race to mine the ocean floor. Four Corners on the companies moving to harvest metal-rich nodules from the Pacific abyss and the scientists warning of irreversible damage.
574. 2025-09-14 - How ancient salt mining transformed prehistoric Europe. The brine springs of the Carpathians and the rock salt of Hallstatt, and how control of salt reshaped Bronze Age economies.
575. 2025-09-18 - The history of Mithraism. The spread of the Mithraic mysteries through the Roman army and its rivalry with early Christianity.
576. 2025-09-26 - Inside Mount Hood's hidden glacier caves. In 2011 two Oregon cavers found more than a mile of tunnels inside the Sandy Glacier, the largest known glacier cave system in the lower 48 states, and began mapping it.
577. 2025-09-27 - An introduction to caving gear. What cavers actually carry and why, from helmets and lights to rope kit, in an environment that is dark, wet, cold and unforgiving.
578. 2025-09-29 - The many lives of the Soviet dissident movement. Benjamin Nathans on how a clandestine movement operated within, and against, the Soviet legal system.
579. 2025-10-04 - Life in darkness: how life survives without sunlight. Documentary on sulphurous, lightless cave ecosystems including Movile Cave in Romania, sealed off for millions of years.
580. 2025-10-11 - Cave divers explore the cenotes of the Yucatan. Thirty years of diving has shown that the Yucatan cenotes are not isolated wells but openings into one connected network of flooded passages.
581. 2025-10-13 - Excavating Gobekli Tepe: interview with Jens Notroff. Archaeologist Jens Notroff, who worked years at the site, on what the excavation actually found.
582. 2025-10-22 - A British cave rescue medical officer on the work. Brendan Sloan describes the volunteer structure of British cave rescue teams and treating casualties underground.
583. 2025-10-22 - Critical Minerals and Rare Earth Elements. Geologist Terry Panhorst on where critical minerals form in the crust and why their supply chains matter.
584. 2025-10-23 - Sutton Hoo and its global connections. Curator Sue Brunning shows how objects in the 1939 ship burial link early medieval England to Europe and Asia.
585. 2025-11-14 - Congo produces its first traceable artisanal cobalt. The state cobalt agency delivers 1,000 tonnes of traceable artisanal cobalt, a first step toward formalising a sector that supplies much of the world's battery metal.
586. 2025-11-20 - Europe's most famous bog bodies. Tollund Man and Grauballe Man, preserved over 2,000 years in Danish peat and thought to be sacrificial victims.
587. 2025-11-23 - Into Earth: learning to cave dive. A Danish underwater photographer works through full cave diver training in Playa del Carmen, and the hazards the course exists to address.
588. 2025-11-26 - The royal salt mines of Poland. Polish public broadcaster episode on the medieval royal salt mines at Wieliczka and Bochnia, a UNESCO World Heritage site.
589. 2025-11-29 - Inside the mystery of Earth's giant crystals. Documentary tracing giant gypsum crystals from Roman mines to Europe's largest geode at Almeria and the Naica cave in Mexico.
590. 2025-12-05 - Landsat Takes Yellowstone's Temperature. USGS on using satellite thermal remote sensing to track more than 10,000 thermal features fed from below.
591. 2025-12-09 - The Hidden World of Plant Roots. Stanford biologist Jose Dinneny on roots as active explorers of the soil rather than passive anchors.
592. 2025-12-10 - Inside South Africa's deadly Stilfontein mine disaster. A 2024 government crackdown on illegal mining at Stilfontein left hundreds of men trapped underground for months without food or water.
593. 2025-12-13 - Geothermal Energy's Massive Leap Forward. The Economist's energy editor on whether new geothermal drilling could scale past nuclear power.
594. 2025-12-15 - The 262 New Species Named in 2025. Natural History Museum scientists on the year's newly described species, including worms, fungi and invertebrates from soil and cave habitats.
595. 2025-12-16 - Prairie Dogs as Ecosystem Engineers. The Smithsonian on black-tailed prairie dogs as a keystone species whose burrowing creates habitat for dozens of other grassland animals.
596. 2026-01-02 - Top Five Yellowstone Geologic Stories of 2025. The observatory's year in review, covering hydrothermal activity, monitoring results and the rumours it had to correct.
597. 2026-01-21 - Guerrero Coyote de Tula en el MNA. Vista de la pieza del Guerrero Coyote de Tula del Museo Nacional de Antropología que algunos expertos relacionan con Ce Acatl Topiltzin, Quetzalcoatl.
598. 2026-01-22 - Hand stencils in Sulawesi may be the oldest cave art. Euronews on claims that stencil paintings in an Indonesian cave date to about 67,800 years ago.
599. 2026-01-31 - Fig. 6.2. Ritual enclosure of Lalibela adjucent to one of the Lalibela rock hewn churches
600. 2026-02-10 - The machine that changed our understanding of history. How a 1900 sponge-diving find off Antikythera produced a geared astronomical calculator two millennia old.
601. 2026-02-13 - An Underground Railroad hiding place found in a New York museum. Historians identify a concealed space in a Merchant's House Museum closet wall.
602. 2026-02-15 - HS2's 450,000 finds in a secret warehouse. The BBC is shown the vast store of objects unearthed by the archaeologists working ahead of the HS2 line.
603. 2026-02-22 - Are Cascadia and the San Andreas Linked?. Chris Goldfinger presents evidence for partial synchronisation between ruptures of the northern San Andreas fault and the Cascadia megathrust.
604. 2026-02-25 - Stone Age Temple Mystery. NOVA on Gobekli Tepe, where hunter-gatherer monuments predate agriculture and overturn assumptions about how civilisation began.
605. 2026-02-26 - The 1979 hostage-taking in Carlsbad Caverns. In 1979 armed men held more than 100 visitors in the Big Room, 750 feet below the surface, in one of the strangest incidents in US national park history.
606. 2026-03-11 - The Wood Wide Web, Thirty Years Later. Christian Schwartz revisits the wood wide web three decades on, weighing what the evidence actually supports against how the idea has been popularised.
607. 2026-03-17 - Yamadera, Part II - Yamadera7486. Rock-cut memorial tablets and grave markers carved into the cliff face at Yamadera (Risshaku-ji) temple complex. Modern photograph of an ancient site.
608. 2026-03-18 - Building Resilience in Alberta's Bats Against White-Nose Syndrome. A 2026 science seminar on white-nose syndrome, which reached Alberta in 2024 after killing millions of North American bats.
609. 2026-03-22 - How Soviet citizens escaped censorship. The samizdat circuit: carbon copies, typewriters and hand-to-hand distribution under the censor.
610. 2026-03-25 - A Hidden Magma Plumbing System on Mars. The Geological Society of America covers a new study finding buried magmatic plumbing on Mars, a comparison point for reading Earth's own.
611. 2026-03-29 - A rare journey inside Son Doong. 60 Minutes takes Scott Pelley into the largest known cave passage in the world, deep in the Vietnamese jungle.
612. 2026-03-29 - South Africa opens its first new underground gold mine in fifteen years. West Wits Mining opens a shaft in Johannesburg, betting that high gold prices make old deposits viable again while illegal mining continues.
613. 2026-03-30 - "Сейсмограф" Seismometer in Moscow Institute of Physics and Technology 20260330 133932. Seismometer in Moscow Institute of Physics and Technology This photo was created by Lesless. It is not in the public domain, and use of this file outside of the licensing terms is a copyright violati.
614. 2026-04-02 - The history of the Paris Catacombs. How the 18th-century clearance of the Cemetery of the Innocents filled the disused limestone quarries with six million dead.
615. 2026-04-02 - The Cascadia Megaquake Is Inevitable. PBS Terra on the Cascadia Subduction Zone, the offshore fault running hundreds of miles along the Pacific Northwest and overdue for a magnitude 9 rupture.
616. 2026-04-09 - 1.9-Billion-Year-Old Bedrock Will Hold Spent Nuclear Fuel. AP descends the Onkalo shaft as the world's first permanent spent-fuel disposal facility prepares to begin operations in Finland.
617. 2026-04-12 - Belowground Biodiversity in Northeast India. A SPUN Underground Explorer samples soil fungi across rainforest, alpine meadow and cold desert to see how much diversity is hidden below.
618. 2026-04-21 - Suzanne Simard Said Trees Talk. The Evidence Is Complicated.. Traces Simard's 1997 Nature paper on carbon transfer between trees, the 'wood wide web' framing the editors gave it, and the scientific pushback that followed.
619. 2026-04-27 - AI used to reconstruct a Pompeii victim's face. Reuters on the first use of AI facial reconstruction on a victim of the AD 79 eruption.
620. 2026-05-02 - Why Drilling to the Mantle Is Almost Impossible. Business Insider on why the Kola borehole barely scratched the crust, and on the technologies being proposed to go deeper.
621. 2026-05-05 - Uplistsikhe - Uplistsikhe8141. Cave dwellings and rock-cut chambers of the ancient troglodyte city of Uplistsikhe, with a medieval Christian basilica visible on the upper right. Modern photograph of an ancient site.
622. 2026-05-05 - Uplistsikhe - Uplistsikhe8144. A basilica-style brick church at the Uplistsikhe cave town complex, situated on a rocky promontory above a river valley. Modern photograph of an ancient site.
623. 2026-05-11 - The 2025 Big Horn Mountains caving expedition. Presentation to the Meramec Valley Grotto on an August 2025 expedition to the caves of the Big Horn Mountains in Wyoming.
624. 2026-05-14 - Life in Pompeii. David Suzuki's documentary on the science being used to read the city's oldest and deepest layers.
625. 2026-05-18 - The price of iron ore: relocating a Swedish city. DW follows the relocation of Kiruna in northern Sweden as the world's largest underground iron ore mine undermines the town.
626. 2026-05-21 - Lithium rising: the race for critical minerals. Full-length documentary filmed across five countries on the competition for lithium, cobalt and copper behind electric vehicles and battery storage.
627. 2026-05-25 - Should we mine the deep ocean?. BBC World Service asks whether the seabed can supply the metals the energy transition needs, or should be left undisturbed.
628. 2026-05-28 - What Are Induced Earthquakes?. A primer from a hydrogeology lab on earthquakes triggered by injecting fluid into the subsurface.
629. 2026-05-29 - African Volcanic Plumbing Systems. An IAVCEI commission webinar with researchers presenting current work on the subsurface magma systems beneath African volcanoes.
630. 2026-06-09 - Writers underground: Soviet samizdat 1967-1982. How hand-typed publications passed hand to hand became a real threat to the Soviet state.
631. 2026-06-11 - Mapping 110 Quadrillion Kilometres of Fungal Threads. SPUN and AMOLF researchers publish in Science the first global estimate of the total length of mycorrhizal mycelium in soil.
632. 2026-06-11 - Life Without Sunlight: The Creatures of Movile Cave. A tour of Movile Cave in Romania, sealed from the surface for millions of years, whose animals depend on chemosynthetic bacteria rather than the sun.
633. 2026-06-17 - A Seismic View of Mars, From Crust to Core. Ross Maguire on the more than 1,000 marsquakes InSight recorded between 2018 and 2022 and what they reveal about a single-plate planet's interior.
634. 2026-06-18 - Hallstatt: a prehistoric salt mine as a data archive. Salt has been won at Hallstatt for over 7,000 years, and the salt has preserved tools, textiles and everyday objects that survive nowhere else.
635. 2026-06-23 - Vindolanda 2026 excavation update. Dr Marta Alberti-Dunn reports new features and finds from the current season at the Roman fort on Hadrian's Wall.
636. 2026-06-24 - Cairnpapple in West Lothian. A kite aerial photo of Cairnpapple looking northwards.
637. 2026-06-29 - The hermit caves of Mount Athos. The cliffside caves where Orthodox monks have lived in complete solitude for centuries.
638. 2026-07-01 - A Hydrothermal Explosion Caught on New Monitoring Gear. On 13 June 2026 Yellowstone's newest geophysical monitoring sites recorded a small hydrothermal explosion at Biscuit Basin.
639. 2026-07-02 - Drilling Into the Mantle: The Kola Superdeep Hole. Engineering account of the Soviet Kola SG-3 borehole, which reached 12,262 m between 1970 and 1992. Covers the drilling technology and why the rock behaved unexpectedly at depth.
640. 2026-07-15 - The Molecule Behind the Naked Mole-Rat's Bee-Like Society. Nature reports research identifying a molecular basis for the eusocial structure of naked mole-rat colonies, where one queen breeds and the rest do not.
641. 2026-07-17 - Twenty great discoveries of 2025-2026. A myth-busting survey of the most significant archaeological finds announced across the past two years.
642. 2026-07-22 - Top archaeological discoveries of 2026 so far. Lost cities, ancient pandemics and other finds announced in the first half of 2026.
643. 2026-07-30 - The archaeological discovery of Petra. Tristan Hughes on the rock-cut city, its tombs and how European travellers reached it.
644. 2026-08-02 - 海軍出水航空隊の掩体壕跡. Photograph showing 海軍出水航空隊の掩体壕跡.
645. 2026-08-02 - A wartime aircraft revetment shelter, Izumi, Japan. The remains of a semi-underground revetment shelter built to protect aircraft at the former Izumi naval air group base in Kagoshima, Japan.
646. 2026-08-03 - Is Yellowstone's North Caldera Rim Rising?. USGS on decades of measured uplift and subsidence on the caldera's north rim, and a new period of uplift that began last year.
647. 2026-08-07 - Do Fungi Help Invasive Willows Spread in Patagonia?. Field research on whether soil fungi mediate the replacement of Patagonia's native willows by non-native ones.

Full text archive: /loreline-text/underground.md