4 ms·

Shorter lifespan: http://health.ucsd.edu/news/2002/02_08_Kripke.html http://health.ucsd.edu/news/2002/02_08_Kripke.html Grey hair: http://www.eurekalert.org/pu

• mgkimsal 15y ago
  weird. I've had some gray (at least, some I and others could notice) since I was 18 (and quite a lot all these years later). One of my brothers is 15 and has some gray. It's not really saying why the hydrogen peroxide builds up though. :/