LUDEK PESEK / SCIENCE PHOTO LIBRARY LUDEK PESEK / SCIENCE PHOTO LIBRARY
Artist's impression of a Tertiary period landscape. This period extended from 65 to about 2 million years ago and is divided into five epochs: the Paleocene, Eocene, Oligocene, Miocene and Pliocene. Dinosaurs died out early on in the Tertiary, and mammals progressed rapidly. This illustration shows some of the reptiles and mammals of the epoch, which included the elephant- like dinotherium and mastodon, also the sabre- toothed tiger. Anthropoid apes appeared, and towards the end the present forms of continents developed. Temperatures dropped signalling the beginning of the ice-ages at the end of the Pliocene.
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