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.

DNA in the blood could tell scientists a person's "biological age," or whether their body functions as older or younger than their actual age.

Being 80 but feeling 40 might prompt someone with cancer to undergo chemotherapy—or not. Age perception isn't the whole story.

The bones of today's kids differ from those of the 1930's, research finds.

Women with polycystic ovary syndrome develop metabolic syndrome earlier than women without the condition, research shows.

Middle-aged or elderly people who gain or lose weight may have an increased death risk, a new study shows.

"Exposure to violence in childhood accelerates biological aging in children as young as 8 years old."

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.

Regardless of socioeconomic factors, people who live to age 65 can expect to live longer than their parents.

Almost half of women over 50 have experienced urine leakage, but two-thirds of these women haven't talked to a doctor about it.