Scientists were amazed to discover a 507-year-old clam that was already 100 in Shakespeare’s day, but why did it live so long ...

Aging brings about a range of changes—often unwelcome—to our bodies: sagging skin, graying or thinning hair, and a decline in muscle strength and vitality. But aging also affects us on the inside, ...

Many mammals deliver in minutes after long pregnancies. See which species have the quickest births to help newborns thrive.

In the animal kingdom, pregnancy rarely follows the rules, with many species being pregnant for a year or more.