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 ...

Giant squids are among the most mysterious predators in the ocean, equipped with long tentacles lined with powerful suckers and hooks designed to seize prey in complete darkness. They rely on stealth ...

Sperm whales have the largest brain of any living animal, weighing up to 9 kilograms (nearly 20 lbs), a key reason scientists believe they possess advanced communication and social intelligence. They ...