Thursday, November 11, 2010

Hair Length

Why does the hair on your head keep growing to an indefinite length, but some other hair stops at a certain length?
Take your eyebrows for example. If you pluck your eyebrows, they grow back quickly. But it never gets so long that it is hanging in your eyes...
Why indeed...

2 comments:

mike rosenberg said...

pretty sure some sort of gene expression involved...hehe

CouscousNKugel said...

That's a good question! I'd never thought of that....