The ‘siberian unicorn’ (Elasmotherium) reproduction sculpture.
Elasmotherium was a genus of large rhinoceros endemic to Eurasia during the late pliocene through the pleistocene existing from 2.6 Ma to at least as late as 39,000 years ago in the late plesitocene. A more recent date of 26,000 BP is considered less reliable.
Three species are recognized. The best known, E. Sibiricum, or Siberian unicorn was the size of a mammoth and is thought to have borne a large, thick horn on its forhead.
Theories about the function of his horn include defense against predators, attracting mates, driving away competitors, sweeping snow from the grass in winter, and digging for water and plant roots. Like all rhinoceroses, elasmotheres were herbivores. Unlike any other rhinos, its high crowned molars were ever growing.
The known specimens of E. sibiricum reach up to 4.5m (15ft) in body length with shoulder heights over 2m (6ft 7 in) while E. Caucasicum reaches at least 5m (16ft) in body length with an estimated mass of 3.6-4.5 tonnes (4-5 short tons), based an isolated molars that significantly exceed those known from the Siberian species. Bother species were among the largest in the family Rhinocerotidae.