How much they weigh: From as little as 60 pounds (27 kilograms) to more than 1,700 pounds (771 kg) ...

When we think of mammals, we usually think of animals that give birth to live babies, like lions or humans. But there’s a small and rare group of mammals that do things differently– they lay eggs!

Researchers uncover new fossils of ancient carnivorous mammals in northern India’s Siwalik region, offering insight into ...

Highly pathogenic avian influenza, commonly called bird flu, has increasingly spread to mammals and infected hundreds of people, raising concerns that it may lead to human-to-human transmission ...