The last sighting of the glass octopus was in 2021, and scientists still don't know much about this highly elusive species.

Octopus fossils are rare ... The word is Greek for “head-foot” and refers to their weird anatomy, by which their arms are attached directly to one side of their head while their “torso ...

10. Not having a skeleton has some advantages for the octopus. Having no skeleton or shell is unusual for an animal with the size and complexity of an octopus. Their make-up does make them more ...

It is free of wires, batteries, and any hard material—like its namesake, the octopus, which has no internal skeleton. A Harvard University research team led by engineering professors Robert Wood ...