Janjucetus dullardi,' a dolphin-sized predator with slicing teeth, offers rare insight into the earliest stage of baleen whale evolution.

Australia is home to a unique bunch of native land mammals, such as koalas, wombats and wallabies. These furballs evolved in isolation on this island continent and have become Australian symbols. But ...

Unearthed in Chilean Patagonia, the 74-million-year-old Yeutherium pressor is the smallest known South American mammal from the dinosaur era.

Digital reconstruction of tiny, 400-million-year-old jawless fish shows how traits for evading predators gave rise to hunters ...

I n a mountain forest of Indonesia, a "fanged" creature sat in a small river, its wrinkly body half out of the water. Its ...