Sperm whales, the largest predators of the ocean, dive deep into the abyss, where no human dares to venture, and face off against the infamous killer whale in an epic battle. Why watch this video?

The threat of killer whales could be why societies of sperm whales in the Atlantic and Pacific differ so much, researchers say. The sperm whale, the largest toothed whale, possesses the largest ...

A 12-inch whale tooth, larger than that of a Tyrannosaurus rex, was discovered this month in Melbourne, Australia. Experts say it likely belonged to an extinct species of "killer sperm whale" that ...

Big-brained cetaceans, such as the sperm whale, show sophisticated behaviors, including babysitting. (David Loh/Reuters) Whales and dolphins — both members of the cetacean family — are among ...

Whales may be known as gentle giants, but they still have a looming presence as the world’s loudest and largest animals. The Antarctic blue whale can weigh up to 400,000 pounds and stretches to ...

It gives us killer whales, beluga whales, sperm whales, blue whales, and just when you think there can’t be any more whales, a mysterious possible new species rears its slick, rubbery head.

But this whale was much larger than the killer whale, growing to be about 60 feet long based on guesses made from the skull size, about the same as a modern sperm whale. Killer whales are only ...

And because they are here, the sperm whales are not. These killer whales can grow up to eight-and-a-half feet in size. Sala told us seeing them up close almost never happens.

Killer whales in general are one of the few mammals known to undergo menopause. ... [Related: Sperm whales have a surprisingly deep—and useful—culture.] Differences aside, ...