Why Does Body Hair Stay Short?

Mystery Hour Question

When certain hair on your body gets to a certain length it stops growing. How does the body know it has got to that certain length to stop.

Tom, Heathrow

Answer

Name:  James O’Brien                                                                                                                                       

Qualification: Host                                                                                                                                                  

Answer: They don’t stop growing, they’re constantly replenishing and recycling.