The Toba Catastrophe Theory [1] is one of the frontrunners as to why humans have such little genetic diversity in modern humans. [1] http://en.wikipedia.org/wi

The Toba Catastrophe Theory [1] is one of the frontrunners as to why humans have such little genetic diversity in modern humans. [1] http://en.wikipedia.org/wiki/Toba_catastrophe_theory#Genetic_bottlenecks_in_humans http://en.wikipedia.org/wiki/Toba_catastrophe_theory#Genetic...