Sounds made by humpback whales as they passed through the ocean off Oahu, Hawaii, were captured on camera in recent days. Mark Healey, who recorded the mesmerising audio, said he could hear them ...

Researchers are listening for critically endangered North Atlantic right whales off the coast of Massachusetts with the help of two new buoys in the water. The high-tech buoys were deployed last ...

The blue whale, which is the largest flight species, produces sounds that a killer whale cannot hear, with their loudest sounds below 80 hertz.

Sounds made by humpback whales as they passed through the ocean off Oahu, Hawaii, were captured on camera in recent days. Mark Healey, who recorded the mesmerising audio, said he could hear them when ...