I am prematurely gray, have been taking Metamucil since the eighth grade, and want nothing more than for you kids to stay off my lawn. So, to me, it’s entirely unsurprising that a recent study found that people’s bodies age at wildly different rates. Researchers examined about a thousand 38 year-olds and found that “a good many participants had biological ages in the 50s, while one, described by scientists as an extreme case, had a biological age of 61 years old.” Scientists hope that understanding the aging process of these prematurely old specimens will help us develop ways to slow the process (even if it will be too late for them).

+ Can you convince someone to be more healthy? According to the NYT Upshot, the answer is yes, especially if you pay them.