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May 4, 2018 04:41 pm PDT
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/7nXzk9Uf8Y4/squids-used-to-have-shells-he.html
Squids used to have shells. Here's how they lost them.
Squid ancestors were happy creatures with shells until about 400 million years ago, when the emergence of fish with jaws set off an evolutionary arms race between fish and cephalopods. (more…)
Original Link: http://feeds.boingboing.net/~r/boingboing/iBag/~3/7nXzk9Uf8Y4/squids-used-to-have-shells-he.html
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