Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. It was an orca ...

Killer whales have been spotted hunting down dolphins - and sharing the catch with pals - for the first time. The dramatic new images of orcas in the Humboldt Current system, off Chile, show them ...

In six years studying orcas off Chile’s coast, marine biologist Ana García-Cegarra had never witnessed anything like what she saw in May 2023. In the vast Pacific waters near Antofagasta, a killer ...

Whale sharks are gentle, filter-feeding giants, but orcas in Mexican waters were documented attacking the animals and devouring their livers. By Jason Bittel Off Baja California in Mexico, a killer ...

Preface -- What is a marine mammal? -- Main groups of marine mammals -- Modern taxonomy of marine mammals -- How to look for marine mammals -- Natural history of marine mammals -- Conservation -- How ...