How Did Snakes Lose Their Legs?
Snake ancestors traded four legs for a long flexible spine roughly 100 million years ago. Fossils like Najash caught the transition in progress.
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Why Are Crows So Smart?
Crows pack roughly 1.5 billion neurons into a 10 gram brain using a bird only structure called the pallium. Here is what that buys them.
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What makes an octopus so different from other animals?
No skeleton, half its neurons in its arms, skin it can repaint in a fraction of a second, and a lineage that split from ours 750 million years...
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What makes a shark a shark?
Sharks have no bones. Cartilage skeletons, skin made of teeth, self-replacing jaws and an oil-filled liver explain a body plan that is 450 million years old.
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