How an octopus’s cleverness may have evolved
DNA analysis shows cephalopod makes wide variety of same proteins that spur nervous system development in mammals
![California two-spot octopus](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/08/081315_ss_octopus_free.jpg?fit=860%2C460&ssl=1)
CLEVER CRITTER The genome of the California two-spot octopus may reveal why it’s so smart.
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