Our Most Unlikely Ancestor
Dimetrodon, a lizard-like creature with a distinct sail on its back, dominated the latter part of the Paleozoic Era known as the Permian Period. They oddly had jumbles of traits that were partly reptilian and partly mammalian, earning them the parodoxical name mammal-like reptiles. But if you take a closer look at these ancient creatures, you might see a bit of yourself. Host Hank Green of PBS Eons explains.
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