Grain Brain

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"Other studies since then have confirmed the finding: For every excess pound put on the body, the brain gets a little smaller. How ironic that the bigger the body gets, the smaller the brain gets."

Perlmutter, D. (2013) Grain Brain. New York, NY: Little, Brown and Company. Page 121, Hardcover.

Image of a walnut: iPhone5s. Do you know what animal is said to have had a brain the size of a walnut? (Answer)