Add Yahoo as a preferred source to see more of our stories on Google. Just a blue whale's tongue weighs as much as an adult elephant. But what caused blue whales to grow to such an extraordinary size?

NEW YORK (AP) — Whales are big, but why aren't they bigger? A new study says it's basically about how many calories they can take in. That's the conclusion of researchers who used small boats to chase ...

You don’t have to book a beach vacation to see a blue whale this year—just head to the Saint Louis Science Center. Families can come face-to-fin with the largest creature ever to live on Earth when ...