Year in review: Not all bodies act their age
Cells offer new clues to the mystery of growing old
FOR THE AGES People age at different rates, but the underlying drivers of aging likely remain the same, scientists suggested in 2015.
Evgeny Atamanenko/Shutterstock
Age was all the rage this year, as headlines about a provocative study blared what many people already suspected: People grow old at vastly different rates.