Hank explains the scientific reasons behind why we humans generally prefer to eat donut hamburgers to carrots.
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References
Diet & the evolution of the earliest human ancestors – http://www.pnas.org/content/97/25/13506.full
Australopithecus: Diet – http://en.wikipedia.org/wiki/Australopithicus#Diet
Did cooking make us human? – http://www.youtube.com/watch?v=rf_OWun4Y04