MICHAEL LONG / SCIENCE PHOTO LIBRARY MICHAEL LONG / SCIENCE PHOTO LIBRARY
Miacis, illustration. This extinct prehistoric mammal lived from the Late Paleocene to the Late Eocene (from around 59 to 33 million years ago). It was an early ancestor of the animals grouped under Carnivora. Miacis was weasel-sized (similar to a pine marten), probably preying on smaller animals in a forest environment. Its fossils have been found in North America and Eurasia,.
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