FILE 001Ice Age🦏ElasmotheriumThe Elasmotherium, sometimes called the "Siberian unicorn," was a massive Ice Age rhinoceros with a single enormous horn estimated at <hl>3 feet long</hl>. It survived until about 29,000 years ago — far later than previously thought.SrcNature Ecology & EvolutionPass the claimOpen file
FILE 002Ice Age🦏ShareElasmotheriumThe Elasmotherium, nicknamed the "Siberian unicorn," was a massive Ice Age rhino that stood 6 feet at the shoulder and may have carried a <hl>single enormous horn up to 3 feet long</hl>. It survived until roughly 29,000 years ago.SrcNature Ecology & Evolution
FILE 003Ice Age🧊ShareLast Glacial MaximumDuring the Last Glacial Maximum (roughly 26,000–19,000 years ago), ice sheets up to <hl>2 miles thick</hl> covered most of Canada, northern Europe, and Scandinavia. Sea levels dropped 400 feet, exposing vast areas of continental shelf.SrcUSGS
FILE 004Ice Age🐆ShareCave lionsCave lions were about 25% larger than modern African lions and roamed from Europe to Alaska across the Bering Land Bridge. Prehistoric cave paintings in France's Chauvet Cave depict them <hl>hunting in packs without manes</hl>.SrcFrench Ministry of Culture
FILE 005Ice Age🐎Shareoriginated in North AmericaHorses actually originated in North America around 55 million years ago and crossed the Bering Land Bridge into Asia. They went <hl>extinct in the Americas</hl> roughly 10,000 years ago and were only reintroduced by Spanish colonizers in the 1500s.SrcSmithsonian National Museum of Natural History
FILE 006Ice Age🦥Sharegiant ground slothThe giant ground sloth (Megatherium) stood up to <hl>20 feet tall</hl> on its hind legs and weighed 4 tons — the size of an elephant. It used massive claws to strip trees and was one of the largest land mammals to ever exist.SrcNatural History Museum, London
FILE 007Ice Age🧊Sharefive major ice agesEarth has experienced at least five major ice ages over the past 2.4 billion years. The most severe — the <hl>"Snowball Earth"</hl> events around 700 million years ago — may have frozen the entire planet from poles to equator.SrcGeological Society of America
FILE 008Ice Age🦣ShareWoolly mammothsWoolly mammoths stood up to 11 feet tall at the shoulder and weighed roughly 6 tons. Their fur could grow over <hl>3 feet long</hl>, and beneath it they had a thick layer of fat up to 4 inches deep for insulation against Arctic cold.SrcAmerican Museum of Natural History
FILE 009Ice Age🦣Sharetiny earsWoolly mammoths had tiny ears — roughly one-tenth the size of an African elephant's — to minimize heat loss in Arctic conditions. Their tails were short and stubby for the same reason.SrcAmerican Museum of Natural History
FILE 010Ice Age🧊SharePermafrostPermafrost in Siberia and Alaska has preserved Ice Age remains so well that scientists have found <hl>30,000-year-old grass still green</hl> in mammoth stomach contents, and ancient plant seeds that were successfully germinated into living flowers.SrcProceedings of the National Academy of Sciences
FILE 011Ice Age🦣Share3.5 million Ice Age fossilsThe La Brea Tar Pits in Los Angeles have preserved over 3.5 million Ice Age fossils — including mammoths, saber-toothed cats, dire wolves, and giant sloths. Animals got trapped in the natural asphalt seeps and were preserved for 10,000–50,000 years.SrcLa Brea Tar Pits & Museum
FILE 012Ice Age🏔️ShareLaurentide Ice SheetThe Laurentide Ice Sheet that covered most of Canada and the northern U.S. contained enough frozen water to raise global sea levels by <hl>over 200 feet</hl> when it finally melted. Its weight was so immense it pushed the Earth's crust down — parts of Canada are still slowly rebounding today.SrcUSGS
FILE 013Ice Age🐎Sharewild horses roamed North AmericaDuring the Ice Age, wild horses roamed North America by the millions alongside mammoths and bison. Ancient cave art and fossil evidence show they were <hl>stocky, zebra-like animals</hl> quite different from modern domesticated horses.SrcSmithsonian NMNH
FILE 014Ice Age🐘SharemastodonThe mastodon and the woolly mammoth were actually <hl>very different animals</hl> — mastodons had shorter, stockier bodies with cone-shaped teeth for browsing forests, while mammoths had flat teeth for grazing grasslands. They split from a common ancestor 25 million years ago.SrcAmerican Museum of Natural History
FILE 015Ice Age🐘ShareColumbian mammothThe Columbian mammoth — not the woolly mammoth — was actually the larger species, standing up to <hl>13 feet tall</hl> and weighing 10 tons. It ranged across the southern United States and Mexico and had much less fur than its woolly cousin.SrcLa Brea Tar Pits & Museum
FILE 016Ice Age🦣ShareRouffignac CaveCave paintings in France's Rouffignac Cave depict woolly mammoths with remarkable anatomical accuracy — showing their <hl>domed heads, humped shoulders, and small tails</hl>. These paintings are over 13,000 years old.SrcFrench Ministry of Culture
FILE 017Ice Age🌊ShareMissoula FloodsWhen the Ice Age ended and glaciers melted, the resulting floods were catastrophic. The Missoula Floods in the Pacific Northwest released water volumes equal to <hl>10 times the combined flow of all rivers on Earth</hl>, carving the Channeled Scablands in Washington state.SrcUSGS
FILE 018Ice Age🦌ShareIrish elkThe Irish elk had the largest antlers of any known animal — spanning up to <hl>12 feet across</hl> and weighing 90 pounds. Despite its name, it lived across Europe and Asia and went extinct roughly 7,700 years ago.SrcNatural History Museum, London
FILE 019Ice Age🦏Sharewoolly rhinocerosThe woolly rhinoceros roamed Europe and Asia during the Ice Age with a massive <hl>3-foot-long horn</hl>. Cave paintings from 30,000 years ago in France's Chauvet Cave show them in remarkable detail — some of the oldest art ever made.SrcFrench Ministry of Culture
FILE 020Ice Age🦣Sharetiny earsWoolly mammoths had tiny ears — only about 15 inches long compared to an African elephant's 6-foot ears. Smaller ears reduced heat loss in freezing Arctic conditions, the same adaptation seen in modern Arctic foxes and hares.SrcAmerican Museum of Natural History
FILE 021Ice Age🧊Sharesea levels dropped 400 feetAt the peak of the Ice Age, so much water was locked in glaciers that sea levels dropped 400 feet — exposing millions of square miles of continental shelf and connecting landmasses that are now separated by ocean.SrcUSGS
FILE 022Ice Age🌍Sharefive major ice agesEarth has experienced at least five major ice ages over the past 2.4 billion years. The one people commonly refer to — the Pleistocene glaciation — began roughly 2.6 million years ago and technically continues today.SrcGeological Society of America
FILE 023Ice Age🌊Shareglacial lakesWhen the ice sheets melted at the end of the last Ice Age, massive glacial lakes formed behind ice dams. When these dams broke, they unleashed catastrophic "megafloods" — the <hl>Missoula Floods</hl> carved the Channeled Scablands of Washington state in days.SrcUSGS
FILE 024Ice Age🦣Sharelegal ivory tradeIn Siberia, so many mammoth tusks have been preserved in permafrost that there is an active legal ivory trade in mammoth tusks. An estimated <hl>10 million mammoths</hl> may still be frozen in the Siberian tundra, and tusks sell for thousands of dollars per pound.SrcNational Geographic
FILE 025Ice Age🐅Sharesaber-toothed catThe saber-toothed cat (Smilodon) had canine teeth up to <hl>11 inches long</hl>, but its bite force was actually weaker than a modern lion's. Scientists believe it used its massive teeth as precision weapons, targeting the throat of prey.SrcLa Brea Tar Pits & Museum