Contact: Ross Secord
University of Nebraska-Lincoln
Caption: This is an artist's reconstruction of Sifrhippus sandrae (right) touching noses with a modern Morgan horse (left) that stands about 5 feet high at the shoulders and weighs about 1,000 pounds. Sifrhippus was the size of a small house cat (about 8.5 pounds) at the beginning of the Eocene (approximately 55.8 million years ago) and is the earliest known horse.
Credit: Danielle Byerley, Florida Museum of Natural History.
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