Nineteenth-century scientists speculated that the Elasmotherium must have had a single horn. “The whole analogy with the rhinoceros points with the greatest certainty to the previous existence of a horn,” wrote Russian zoologist Alexander Brandt. “Which, to judge from the size of the blood vessels once encircling the base, must have possessed enormous dimensions.”
Brandt suspected the Siberian Elasmotherium (Elasmotherium sibiricum) of being the basis of a Tatar myth about a unicorn with a gigantic horn. However, since the Elasmotherium was thought to have disappeared about 350,000 years ago, no humans would have been around to see them back then.