Weston Gaylord’s mind-bender of play enhances the mystery of an already fascinating creature and of the limitless possibilities of what we don’t know.

A freediver in Cyprus was surprised to play a game of hide-and-seek with an octopus on Sunday. The diver, Matthew Hyatt, who has posted daily video updates to his social media about his attempts to ...

The white package that arrived at Mattias Krantz’s home in Sweden after a five-hour flight contained an octopus that Krantz saved from becoming someone’s meal. Krantz’s hopes for the octopus, which he ...