How can we know that there were dinosaurs millions years ago? How do we know how they looked?
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1: we got fossil record that showed that these creatures lived on the surface at some point and our tech allows us to estimate when they lived. we also got enough of these remains that we could determine that some current creatures were at least partly based on them(ie: the concept that birds are effectively the last living descendants of dinossaurs)
2:we sorta dont, based on the information we do know about them we can take an educated guess tho.
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