Here's an interesting article about why some people seem to age more slowly than others. Apparently, the length of your telemeres – tiny biological clocks at the ends of chromosomes – get shorter over time, until cells die. Here's the punch line: some people have longer telemeres.

Scientists have found a 'Peter Pan gene' that could explain why some people remain baby-faced while others become old before their time.
Millions of Britons are blessed with DNA that makes them look up to eight years younger than their peers.