Researchers using a new drone say they have observed killer whales finding and modifying stalks of kelp to preen each other.

Because Indohyus itself is not a whale, ... an approximately 48-million-year-old even-toed ungulate from the Kashmir region of India, as the closest known fossil relative of whales.

Whales, dolphins and porpoises evolved from a tiny deer-like mammal that adapted to living at sea millions of years ago, ... Evidence to back this comes from fossils of even-toed ungulates, ...

The find could help resolve a long-standing debate over the evolutionary link between whales and hippos. It confirms genetic research placing whales' origin within the ungulate (hoofed animal) group.

One of the first mammals to use echolocation may not have been a bat or a whale, but an early ancestor of horses. Hyopsodus was a weasel-like ungulate that lived 55 million years ago, around the ...

This proposal places whales squarely within the large group of cloven-hoofed mammals (even-toed ungulates) known collectively as the Artiodactyla – the group that includes cows, pigs, sheep ...

Scientists agree that whales are actually highly specialized ungulates, or hoofed mammals. The question has been, to which ungulates are they most closely related?

New research shows southern resident killer whales grooming each other using kelp they’ve ... “It matches well with grooming in other species of animals like apes and ungulates,” Weiss said.