Nautilus
A living fossil with a spiral shell that has survived largely unchanged for 500 million years
Fun Fact
The nautilus uses its chambered shell as a buoyancy control system, filling or emptying gas-filled chambers with a siphuncle to rise or sink precisely in the water column.
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Chimpanzee
Our closest living relative, known for tool use and complex social behavior
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A living fossil fish thought to be extinct for 65 million years until rediscovered in 1938
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Dugong
A marine mammal closely related to the manatee, found in warm coastal waters