The 10 Oldest Fossils, and What They Say About Evolution

By Spiral Education 30 Aug 22:23
SciShow science Hank Green education fossil mammal platypus stromatolites australia ancient palentology rock zircon vertebrate pikaia fish invertebrates crustacean cambrian liverwort plants biology spore michael aranda aranda prehistoric shale burgess shale argentina placoderms bone insect tetrapod silurian amniote egg juramaia eutherian placenta bird archaeopteryx earth history Display all tags
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