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 ...

Social mammals are wildly diverse, given that they can be found across all habitats and species. However, a new line of ...

Add Yahoo as a preferred source to see more of our stories on Google. A female hamadryas baboon grooms a dominant male in Awash National Park, Ethiopia. - Juniors Bildarchiv GmbH/Alamy Stock Photo ...

A surprising new study has found that blocking reproduction in some mammals may increase their life expectancy by an average of 10 percent. The research is primarily based on captive creatures kept in ...

Mammals have approximately the same genes. Yet from skittering lab mice to magnificent bowhead whales or the elegant elephant, the difference in lifespan can be more than a century. Why? An ...

Scientists found an unexpected aging pattern in a mostly intact juvenile mammal skeleton from the paleontological period. By Jack Tamisiea Small mammals often live fast and die young. Rodents and ...

Sexual behavior is one reason why female mammals typically live longer than their male counterparts, according to a new study. Researchers from Germany, Denmark, France, Hungary and Belgium analyzed ...