A humpback whale briefly engulfed a kayaker off the coast of Chile in an incident caught on camera. Experts say it couldn't have swallowed him even if it wanted to.

Time-lapse video shows how a mushroom coral polyp pulses and inflates, flinging its soft body into micro-hops to slowly move itself to a new location.

Neuroscientist Kamilla Souza is bringing the study of whale and dolphin brains to her home country of Brazil. Now there's a team of Brazilian scientists intent on understanding the marine mammals.