
The horse is one of two extant subspecies of "Equus ferus". It is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today. Humans began to domesticate horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC.
Similar species: Odd-toed Ungulates
By Scott Staley
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Uploaded Oct 26, 2012. Captured May 13, 2010 09:42.