More than 40 years since the end of commercial whaling, research reveals an increase in sightings of whales in the south-eastern Atlantic.

Scientists say the noise pollution poses a potentially deadly threat to the second-largest dolphin species.

In the past, the gray whale population recovered fairly quickly. But data on baby whales show that isn’t happening, and a new study finds an alarmingly high mortality rate.

Groundbreaking research shows female relatives — both young and old — acting as "midwives" as a sperm whale gives birth.

New research reveals older singing male whales are increasingly successful at siring offspring compared to younger males.