Researchers use 3D glasses, films and food to test whether cuttlefish use stereopsis to find prey

There are some questions in science that can only be answered by strapping a pair of 3D glasses to an unsuspecting cuttlefish and setting it loose in an underwater movie theatre.

That, at least, was the thinking of a team of researchers who set themselves the task of working out how the marine molluscs know how far away prey is before launching their explosive, tentacled attacks.