Whales are the biggest animal on the planet, dolphins are comparably smaller, but are they all one “big” happy family? They ...

[ Related: Humpback whales use bubble-nets as ‘tools’. ] ...

Killer whales, also known as orcas, are easily recognized by their stunning black and white appearance. These huge animals ...

More than 96% of deforestation, or human-caused, permanent removal of forest cover, occurs in the tropics.

Killer whales learn 'coordinated' attacks on sailboats, some observers say Orcas may be teaching each other new ways to strike boats, observers say.

Killer whales are one of the most intelligent animals; only humans have a larger brain relative to their body size, according to the study.

By Laura Paddison, CNN (CNN) — Extreme heat is a killer and its impact is becoming far, far deadlier as the human-caused climate crisis supercharges temperatures, according to a new study, which ...

A white humpback whale, a seldom seen ocean dweller, recently made an appearance off the coast of Australia, video footage shows. Photographer Chris Prestidge spotted the young marine mammal along ...