Listener Colin got in touch to ask why we go bald on our heads but not elsewhere on our body. Rosalind Davis has been pulling her hair out over this one with Professor Robert Foley from the University of Cambridge to try and find out the answer...
I have no real evidence but I have a theory that baldness is linked to lack of vitamin D3 in your ancestry and going bald would enable future generations to obtain more D3 through letting the skin absorb more by revealing the very most prominent part of the body to sunlight. It is also noticeable that in the the very few parts of the world that get adequate D3 in their diet, then baldness is almost unknown. It is also noticeable that darker skinned people from warmer climates seem to be losing their hair as they go from generation to generation, just a thought. Nev, Tue, 1st Dec 2015