Do octopus brains work like humans’ — or is there another way to be smart?

Three hearts; blue blood; no skeleton; arms like tongues. These are just some of the alien features of octopuses, squid and cuttlefish — members of the cephalopod family. The outlandish list continues. Cephalopod skin can taste chemicals , sense light and change colour and texture rapidly . In many species, the sucker-covered arms can even regenerate. …