The DNA of a whale shows its father was a beluga and its mother was a narwhal.

After release from rehab, bottlenose Billie started walking on water with her tail. Studying how the behavior spread could offer clues about how animals learn from each other.

Although highly controversial now, keeping orcas in captivity helped transform popular and scientific conceptions of the marine mammal from an unfeeling killer to a complex, intelligent animal.

In Chapter 15, author Jason Colby describes a scene of captive orca release and early research into the species' behavior and social organization

Scientists examine lateralized behaviors in blue whales.

Overlooked for half a century, a skull in the Smithsonian collection points to a dolphin species that lived 25 million years ago, according to a study.

Louis Herman, who made seminal discoveries on dolphin cognition, has passed away at age 86.

Researchers report the first evidence that nearby vessels may impair the cetaceans’ foraging abilities.

Woods Hole Oceanographic Institute researcher Peter Tyack expresses the beauty of marine mammal communication.