Dive into the details behind their mind-blowing biology and discover how these mammals became and remain our planet's largest animals ever.

A beluga whale at Chicago's Shedd Aquarium is the first to successfully recover from general anesthesia in captivity after a surgery to remove a network of cysts.

Boaters off the coast of California got the chance to spot a sea creature “trifecta.” “Calm seas” allowed for onlookers to ...