Blue whales, the largest animals on Earth, have been spotted not far off the coast of Massachusetts.

Discover how extreme animal sizes, from the massive blue whale to the tiny shrew, shape their survival strategies.

Q. You wrote that blue whales are the largest mammals. What are the largest and smallest animals of other groups? What ecological problems do animals confront by being extremely big ...

Southern right whales have distinctive white and gray patches of thickened skin on their heads known as callosities. Because ...

A southern right whale swims with its calves in the waters of the South Atlantic Ocean on Oct. 5, 2022. Southern right whales are no longer reproducing at normal rates due to climate-induced changes ...

What researchers spotted off Cape Cod and the Vineyard recently is something they almost never see in these waters.

Aquarium scientists say sightings offer a rare glimpse into the movements of Atlantic blue whales ...

Observers with New England Aquarium said it's the first time they have documented blue whales in their southern New England ...

Three endangered blue whales were seen in New England waters just 24 hours apart, according to the New England Aquarium.

Seeing blue whales outside of their Canadian feeding grounds is rare in the Atlantic. The Western North Atlantic population ...

Scientists in Indonesia have tagged a pygmy blue whale for the first time using a drone. Data from the tag revealed a previously unknown path used by the species on its southern migration from ...

While the blue whale holds the title as both the largest and heaviest animal ever known, other whale species can weigh ...