Loggerhead turtles learn magnetic signatures for navigation and feeding, showcasing two distinct geomagnetic senses for migration, study finds.

This week, see what makes loggerhead sea turtles “dance,” track a cosmic “ghost particle,” uncover an ancient basilica, and more.

Saltwater crocodiles (Crocodylus porosus) are the largest living reptiles on Earth. They’re even bigger than the fearsome Nile crocodile and dwarf alligators, gharials, and caimans. But, just how big ...