Re Wrangham/cooking mentions: - Most anthropologists view Wrangham's tuber theories as wrongheaded re claims that consumption of cooked tubers led to greater hominid brain-size. Beyondveg.com has a very good rebuttal to such theories in 1 article:-

 

http://www.beyondveg.com/nicholson-w/hb/hb-interview1f.shtml

 

As for cooking in general, the vast majority of anthropologists view 250,000 to 300,000 years ago as the advent of cooking because of the sheer abundance of evidence for cooking re hearths etc.. By contrast, there are only a tiny handful of sites cited for earlier dates for the invention of cooking, and the evidence therefrom is all heavily disputed. 

 

Geoff
 		 	   		  
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