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Eximipriapulus reconstruction

Penis worms had hermit crab-like defence system 530 million years ago

8 November 2021

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
Brainless sponges have cells that might be the precursors of neurons

Brainless sponges have cells that might be the precursors of neurons

4 November 2021

Sponges are arguably the simplest animals and they lack a nervous system, but peculiar cells in their digestive chambers may be evolutionary precursors of neurons

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