Octopuses are some of the most complex, bizarre and intelligent creatures in the sea. They can squeeze through holes smaller than a quarter, pull with hundreds of pounds of force, change the color and texture of their skin in an instant and, with their walnut-sized brains, figure out how to open a childproof pill bottle to reach a tasty morsel of crab. With such an impressive array of skills, it was only a matter of time before engineers started asking: Could we make a robot that behaves like an octopus?