Life
Mammals grew big after dinosaurs died but their brains stayed small
After the extinction of the dinosaurs, mammals took over and had room to evolve larger bodies, but their brains remained small to begin with
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After the extinction of the dinosaurs, mammals took over and had room to evolve larger bodies, but their brains remained small to begin with
More than half a billion years ago, tiny penis worms had learned to protect themselves by grabbing and living inside snail-like shells, like hermit crabs do today