Prehistoric baby sling 'made our brains bigger'

The most important aspect of human evolution was facilitated not by Darwinian-style natural selection but by a crucial technological device invented by early Stone Age women, shows research by a leading British prehistorian.

Timothy Taylor of Bradford University claims that increased brain size was made possible by the invention of the baby sling, a development which enabled slower growing, physically and mentally immature offspring to survive and flourish....