Problems I have with this I don,t see a quantity of carbate cal to support energy requirement in natural world. fruit,veg manmade 3.3 million yrs ago crude stone tools were used to break open savenged bones. Human hands evolved during this practice Success in this leads to a dense nutrient source ,time for toolmaking,increase in brain size. 2 recently found site,s Africa(130000yrs) Siberia(15000yrs) have horse,hippo and bear,mammouth. Why risk it because of 1 million fat cal. Why would you use energy for such a low payoff(carbate) BM