The octopus is unique among animals in that it can essentially turn itself into liquid, Terminator style. Get yourself a 600-pound octopus and leave it unsupervised and the thing will squeeze itself into a quarter-sized tube and melt its way to freedom. And its manipulation superpowers are legendary—cram it into a jar and it’ll unscrew its way out. So it goes when you’ve got no bones. And loosey-goosey octopuses can teach us a thing or two about robots.