Woolly Mammoth (Mammuthis) skeleton, approximately 3m (9ft) high 5.5m (16ft) long, discovered in the ice in Siberia in 1799. Extinct genus of elephant from Pleistocene Epoch (2,500,000 to 10,000 years ago) found in fossil deposits and in northern Europe as 30,000 year-old frozen carcasses in melting glaciers. Engraving from George Leopold Cuvier The Animal Kingdom London 1830.