These estimates put the Perucetus as being as heavy as or heavier than the biggest blue whales ever known – even though it’s considerably shorter at just 17 metres long, compared to blue ...

It's an ancient, long-extinct whale that would have tipped the scales at close to 200 tonnes. Only some of the very biggest blue whale specimens might have rivalled its heft, researchers say.

An image showing the fin that experts say is evidence that this is a blue whale Genetic material from a large whale killed off the coast of Iceland has confirmed the creature was a rare hybrid.

Why they're awesome: The largest animal on Earth is thought to be the blue whale, but these strange sea creatures can grow even longer — reaching up to 150 feet (46 meters) in length.

Last weekend, about 50 passengers and crew aboard the Cape May Whale Watch and Research Center vessel American Star got a view of a blue whale. Such a sighting off the coast of New Jersey is rare ...

By comparison, college and professional basketball courts are 94 feet long. The weight of one blue whale could equal that of dozens of elephants. To support a creature of this magnitude, ...