LIONEL BRET / LOOK AT SCIENCES / SCIENCE PHOTO LIBRARY LIONEL BRET / LOOK AT SCIENCES / SCIENCE PHOTO LIBRARY
Evolution of life on Earth. Sequence of artworks showing the timeline of the evolution of life on Earth, first in the sea and then on land, from the Proterozoic (650 million years ago) to the Eocene (40 million years ago). From left, the periods and fauna shown are: the Ediacaran (sessile invertebrates: Dickinsonia), the Cambrian (Burgess Shale arthropods: Marrella), the Ordovician (trilobites), the Devonian (ammonites), the Carboniferous (the first terrestrial land animals and tetrapods), the Jurassic (sauropod dinosaurs), the Cretaceous (theropod and ornithischian dinosaurs), and the Eocene (mammals such as horses and Diprotodon).
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