Has economic stagnation induced less-educated Americans to turn to drugs, alcohol, and suicide? New research complicates this "deaths of despair" theory.

"We were surprised by the dramatic differences between the old mice that received the eNAMPT of young mice and old mice that received saline as a control."

Older adults with obesity enjoy fewer years without limits in physical function or daily living activities, research finds.

A new discovery suggests a way to slow motor function decline and increased frailty in worms. Could it work for aging mammals, too?

You might've heard that cold temperatures slow down the aging process, but new research shows that there's more to it than turning down the thermostat.

Larger bodies or slower metabolisms don't keep warm-blooded animals going. It's our brains, not our bodies, that make human lifespans so long.