Animals from the Cerro de los Batallones fossil site. Computer illustration showing a variety of prehistoric animals whose fossils have been found at the Cerro de los Batallones fossil site at Torrejon de Velasco, Madrid, Spain. Cerro de los Batallones consists of nine sites where a number of fossils of different animals from the Late Miocene epoch (around 12 to 5 million years ago) have been found. Shown here are (from left to right): Micromeryx sp. deer, Promegantereon sp. sabre-toothed cat (branch, upper left), Magericyon sp. bear-dog (lying down, bottom left), Indarctos sp. bear (background, left), Aceratherium sp. rhinoceros herd (centre), Microstonyx sp. pig (background, centre-left), Tetralophodon sp. elephants (upper centre), Hipparion sp. horses (centre-right), Decennatherium sp. giraffes (background), Simocyon sp. (branch, top right), Machairodus sp. sabre-toothed cats (right) and Protictitherium sp. hyena (bottom right).