In many ways, the deep ocean feels like an entirely different planet from the one we live on—home to some of Earth’s most extraordinary creatures, two of the most evocative being the largest toothed ...

Sperm whales, the planet’s largest toothed predator, have incredibly complex social structures and cultural practices. During a recent WWF-backed research expedition around Greece’s northwestern ...

“Why did the sperm whales dive down to the deep?” The answer, say researchers, may be “to take advantage of the sluggish squid”. Bill Gilly at Stanford University in California, US, and colleagues ...