Across 1,000 species, males die younger than females—even in zoos. A global study shows biology, not just lifestyle, drives sex differences in lifespan.

Researchers at the Max Planck Institute found that females outlive males in all species of mammals ...

Women live longer than men - except when males don't play the field, suggests a new study. Females tend to have greater longevity among species with strong competition for mates – as is the case with ...

In most mammals, females live longer than males, but in birds the trend goes the other way – a study of over 1000 species points to possible reasons for these differences ...

Cecropia moths thrive in forests and suburban areas across the U.S. and southern Canada. Birds and bats hunt them, but their large size and camouflage wings provide natural protection. Females release ...

Around the world, women on average live longer than men. This striking pattern holds true across nearly all countries and historical time periods. Although the gap between the sexes has narrowed in ...

These spooky animals seem like the stuff of science fiction, but they really exist. Truth is stranger than fiction!

The name “lion” doesn’t only apply to the king of the jungle. Perhaps in a nod of deference, there are many animals that share the king’s namesake. Here are four.

Learn why living in a city makes a certain species of lizard more social, revealing an effect of urbanization on animal behavior.