We may be close to a cure for baldness.
For the first time, new human hairs have been grown from specialized skin cells that can be multiplied to create a full head of hair.
Current treatments depend on hair transplants and hormonal drugs to slow hair loss, but the new process grows hair where hair hasn't been growing.
Researchers say it needs to be studied more to see if the reprogrammed skin cells can continue to grow new hair after it naturally falls out.
The technique also needs to be improved so that it makes hairs of the right size and appearance, because some of the hairs grew without any color.