Pre-history is divided into periods, The Stone Age, The Bronze Age, and The Iron Age. Pre-history means before written history, so what we know about our ancestors is through the objects they left behind. The discovers in 1911 of fragments of pre-historic remains, were found, included fragments of teeth and thigh bones of, a Mastodon, a Hippopotamus, and a Beaver, part of a Red Deer’s antler, also the teeth of a Pleistocene horse. These animals roamed Brighton and Hove Sussex and other areas in England at different times during the Ages. A Mastodon is an extinct relative of the elephant. It was similar in size to today’s elephants, a woolly type of elephants though it had a slightly longer body and shorter legs.