Why don't scientists take a clue from beard hair?

[baldozer]

There is no beard until you reach puberty. Then the beard suddenly start to grow so much that if you don't shave you will have a very long beard. So what I'm trying to say is that hairs on your face which were once vellus hairs became long terminal hairs after reaching puberty.

If you see the head of a bald man under light, you will notice his head is full of vellus hairs. So my question is why can't the scientists take a clue from how a beard suddenly start growing after the onset of puberty, to replicate this process and make the vellus hairs of a bald man start producing long terminal hairs?

[Tracy C]

So my question is why can't the scientists take a clue from how a beard suddenly start growing after the onset of puberty..?

They have. The research has been in process for a long while now.