Did Cooking in HotSprings Make Human's Brainy?
economist.com
economist.com
Reminds me of that hypothesis that modern humans stayed in Africa until very late (60,000kya) because we were relying on one lake with clams that have protein needed for brain synthesis, until somebody get the mutation to make it ourself. I forgot the exact details, though...
Anyway it is horseshit. A lot of just-soing.
Also a population of hundreds is insufficient - it means a million years of evolution would have to take place in a tiny genetic background insufficient to yield much genetic heterogeneity - the other necessary piece to produce evolution.