New research is "an arrow through the chest" for the theory that humpback whales sing to attract mates. Instead, their song is much closer to sonar.

Fifty years later, scientists are still discovering the consequences of whale hunting. New findings reveal how the giants' absence affects the ecosystem.

Whale songs are more like freeform dancing than music, says Eduardo Mercado. "What the singers are doing seems to be much more dynamic."

The cetacean blowhole is a unique kind of nasal passage: It rises at an angle relative to the roof of the mouth and exits at the top of the head.

Conservation measures for blue whales should include the southwest coast of India, where underwater microphones have picked up their moan-like songs.

The North Atlantic right whale is in serious trouble, researchers report. Fewer than 366 of the endangered whales are left on the entire planet .

Humpback whales don't learn songs from other whales. But what they're doing is "actually more impressive," says Eduardo Mercado.

Human-created noise can disrupt the behavior, physiology, reproduction, and ecosystems of whales and other ocean life. It can even lead to death.

"That humans are directly killing killer whales across all age classes is significant; it says we can do a better job."

Blue whales switch from nighttime to daytime singing when they start to migrate, according to a new study.