Excavation works at the cave site Sima de los Huesos.
'A Flintstone Moment': Mammoth Amount of Ice Age Fossils Found in Colorado…
Paleontologist Kirk Johnson explains liquefaction…
In Colorado, scientists made a very big and plentiful find of bones dating back to the Ice Age. Tom Bearden reports on what kind of fossils were unearthed and what the new findings can tell us.
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