The size of the brain is also bound by the huge amount of calories it consumes, and by how delicate it is. 5 minutes without oxygen? Boom, the organ you spent

The size of the brain is also bound by the huge amount of calories it consumes, and by how delicate it is. 5 minutes without oxygen? Boom, the organ you spent 20 years grooming is gone. Have the munchies? With your brain burning up to 30% of your calories, it may be the culprit.