Add Yahoo as a preferred source to see more of our stories on Google. The blue whale holds the title as the largest animal ever known to have lived on Earth. This video explores how big blue whales ...

The largest animal that has ever lived is not a dinosaur from Yore but a living mammal that still crosses our oceans. The blue whale’s record‑breaking bulk depends on a cardiovascular system pushed to ...

Its appetite hinges on nutrient-rich krill swarms, so climate shifts that shrink krill threaten energy reserves and migration. Read on to discover the 12-inch-thick throat muscles and a 90-second gulp ...

Learn why blue whale calves are prime orca targets and how their massive mothers use slipstreams, allies, and shockwaves to ...