What Scientists Learned by Putting 3-D Glasses on Cuttlefish
They perceive depth in a very different way than we do.
Some cuttlefish absolutely refuse to wear 3-D glasses.
These relatives of squid and octopuses have blimplike bodies that end in a ring of eight arms topped by two prominent eyes. It’s not hard to mount a pair of specs in front of those eyes, but a cuttlefish’s arms are so dexterous that, if it’s displeased with its new accoutrements, it can just yank them off. “And indeed, that happened a ,” says from the University of Minnesota, who spent the better part of a recent summer trying to accessorize the animals. “But about 20 to 30 percent didn’t seem to be bothered. Everyone was very surprised.”
