Mammuthus columbi was a giant elephant-like mammal which roamed the temperate parts of North America some 10,000 years ago. The Columbian mammoth was an important relative of the woolly mammoth of Europe and Siberia. The largest collection of fossilized remains of Mammuthus columbi was discovered by a housing developer in South Dakota. The site, known as the Mammoth Site of Hot Springs, has yielded 43 mammoths so far - and with only 15% of the site unearthed to date, experts are predicting that at least another 100 will be found. Scientist believe that the mammoths became trapped in a large sinkhole when they came to drink. the largest mounted skeleton of Mammuthus columbi is housed at the University of Nebraska State Museum and is 4 metres in height.