According to most experts, the first mammal was Morganucodon, a small, shrew-like rodent that appeared during the Jurassic Period, approximately 200 million years ago. It weighed a few ounces and ...

DNA analysis reveals a fanged frog scientists thought was one species for nearly 200 years is actually several hidden species ...

Human beings have been at the center of ecological change on Earth for thousands of years. But as history shows, no species ...

Imagine an animal that seems to be assembled from various other creatures: it has large eyes, the round body of a rabbit, a rodent’s pointed snout, tiny pig-like hooves, and even fangs like those of a ...

For nearly two centuries, a small brown frog living in Southeast Asian rainforests was considered a single, well-understood ...

Scientists may have been dramatically undercounting the number of vertebrate species on Earth. A large analysis of more than 300 studies suggests that for every recognized species of fish, bird, ...

Mammals are not especially diverse. Roughly 6,800 mammal species are known to exist, compared with about 8,800 species of amphibian, 11,000 species of bird and 12,500 of reptile. Yet when most people ...

A plantation worker photographed this new genus of mammal in New Guinea, thought to have been dead for 6,000 years.

Add Yahoo as a preferred source to see more of our stories on Google. Pangolins are the most heavily trafficked wild mammals on Earth, despite full international trade bans. A single pangolin can ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists have confirmed the rediscovery of Attenborough's long-beaked echidna, a species previously thought to be extinct for ...

How scientists (and the rest of us) are finding 16,000 new species a month.