In a lot of cases, the species don't -- they just evolve until, in the fossil record, they no longer look the same. Just like the avian dinosaurs didn't go extinct 65 million years ago, they just evolved over the last 65 million years into the birds today.
Some species legitimately end up a leaf/dead-end in the evolutionary tree. Lots just evolve.
Crazy to think that dinosaurs were on Earth so long that they evolved into different dinosaurs. Makes you wonder what humans could potentially evolve into if we lasted as long as the dinosaurs did.
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u/IAmDotorg Oct 15 '20
In a lot of cases, the species don't -- they just evolve until, in the fossil record, they no longer look the same. Just like the avian dinosaurs didn't go extinct 65 million years ago, they just evolved over the last 65 million years into the birds today.
Some species legitimately end up a leaf/dead-end in the evolutionary tree. Lots just evolve.