Both literally and figuratively speaking, walnuts are “brain food”. Physically the walnut looks a lot like the human brain. The thin, outer green cover that is

Both literally and figuratively speaking, walnuts are “brain food”. Physically the walnut looks a lot like the human brain. The thin, outer green cover that is taken out before the walnuts are sold is similar to the scalp. The hard shell of a walnut is like a skull. The thin sheet inside, with its paper-like partitions between the two halves of the walnut, is like the membrane. The shape of the walnut itself represents the human brain’s two hemispheres. Hmm.