This is amazing, I guess is just a matter of time till we can grow back any part of the body.
Medicine's Cutting Edge: Re-Growing Organs The Future Is Here: Regenerative Powder, Ink Jet Heart Cells And Custom-Made Body Parts
Imagine re-growing a severed fingertip, or creating an organ in the lab that can be transplanted into a patient without risk of rejection. It sounds like science fiction, but it's not. It's the burgeoning field of regenerative medicine, in which scientists are learning to harness the body's own power to regenerate itself, with astonishing results. Correspondent Wyatt Andrews brings you to the scientific frontier.