In many ways, the deep ocean feels like an entirely different planet from the one we live on—home to some of Earth’s most extraordinary creatures, two of the most evocative being the largest toothed ...

Where it lives: Tropical and temperate waters around the world. What it eats: Deep-sea squid, octopuses, crustaceans and fish. Dwarf sperm whales have an unusual way to protect themselves if they come ...

A system called "SAvE Whales," developed in Greece and tested in the Greek seas, aims to minimize the threat of ship strikes to whales.