And in unrelated news: water is wet, winter is cold and the sky is blue. Of course vegetarians have smaller brains, how else to explain their insane diet? According to an article on Signs of the Times, written by Unvegan Hero Barry Groves, so much of brain size is determined by fat intake. As he says, “About half our brain and nervous system is composed of complicated, long-chain, fatty acids.” Plants don’t have these fatty acids and our bodies aren’t exactly capable of making them ourselves. But you know what are capable of producing these fatty acids? Dumb herbivores.