The kraken: a giant squid or octopus of myth, seems to have swam in the Cretaceous oceans, a Japanese study shows.

New analyses of fossilized jaws reveal that massive, kraken-like octopuses once hunted alongside other marine predators.

Down in the midnight zone, where light fades to nothing, a single breath becomes a long commitment. Sperm whales slip beneath the surface and vanish into cold pressure that would crush most animals.

During the Cretaceous, 19-metre-long predatory octopuses swam the seas, and evidence from their fossilised remains suggest ...