The vertebrate cerebrum (brain) is formed by two cerebral hemispheres that are separated by a groove, the medial longitudinal fissure.The brain can thus be described as being divided into left and right cerebral hemispheres.n eutherian (placental) mammals, the hemispheres are linked by the corpus callosum, a very large bundle of nerve fibers. Smaller commissures, including the anterior commissure, the posterior commissure and the hippocampal commissure also join the hemispheres and these are also present in other vertebrates.
Although today ubiquitous across the globe, the peanut (Arachis hypogaea) was native only to South America, and it is believed to come from the foothills of the Andes in Bolivia and Peru. Ancient, anthropologists have found evidence of peanut cultivation dating back at least 7,600 years.
Peanut butter, the everyman staple, which contains neither butter nor nuts (peanuts are legumes), originated as a health food of the upper classes. First created for sanitariums like John Harvey Kelloggâs Western Health Reform Institute, it satisfied the need for a protein-rich food that did not have to be chewed.