When the earliest horses appeared about 56 million years ago, they were about the size of a miniature schnauzer. Then, over the next 130,000 years, these "protohorses" became even smaller, shrinking to the size of a house cat (artist’s reconstruction of Sifrhippus sandrae, right, compared with a modern-day Morgan horse, which weighs a half-ton). Credit: Credit: Danielle Byerley/Florida Museum of Natural History Source: http://news.sciencemag.org
Scale replica of the fossils of a giant snake that lived 65 millions years ago. 48 feet, 2,500 pounds. Titanaboa.
dinosaurs anatomy - Buscar con Google
Dog sketch. If you love animals, please visit www.whatcanwe.org