What is Columbian mammoth?
{{Taxobox |name = Columbian mammoth |extinct = c. 2000 BC |fossil_range = mid [[Pleistocene]] <br/> to early [[Holocene]] 1.5–0.011 mya |image = File:Columbian mammoth.JPG | image_width = 250px | image_caption = Columbian mammoth |regnum = [[Animal]]ia |classis = [[Mammal]]ia |ordo = [[Proboscidea]] |familia = [[Elephantidae]] |genus = †''[[Mammuthus]]'' |binomial = ''Mammuthus columbi'' |binomial_authority = ([[Blumenbach]], 1799)}} The '''Columbian mammoth''' (''Mammuthus columbi''), or Imperial mammoth, was a species of [[mammoth]] which lived late in the [[Pleistocene]] period.<ref>{{cite journal|author=Jacob Enk |display-authors = etal |title=Complete Columbian mammoth mitogenome suggests interbreeding with woolly mammoths|date= 2011|journal=Genome Biology|publisher=BioMed Central|volume=12|issue=5|page=R51|doi=10.1186/gb-2011-12-5-r51|doi-access = free |pmid = 21627792 |pmc = 3219973 }}</ref> Its remains have been found in [[Canada]], the [[United States]], [[Nicaragua]] and [[Mexico]].<ref>{{cite web|url=http://fossilworks.org/cgi-bin/bridge.pl?taxon_no=46022&action=checkTaxonInfo|title=†''Mammuthus columbi'' Falconer 1857 (Columbian mammoth)|work=Fossilworks|access-date=18 February 2014|archive-date=4 March 2016|archive-url=https://web.archive.org/web/20160304132256/http://fossilworks.org/cgi-bin/bridge.pl?taxon_no=46022&action=checkTaxonInfo|url-status=dead}}</ref> The Columbian mammoth went extinct at the end of the [[ice age]]s about 11,000 years ago. It shared the fate of many other large mammals, whose extinction is attributed to [[hunting]] and [[climate change]].<ref>Martin P.S. & Klein R.G. (eds) 1984. ''Quarternary extinctions: a prehistoric revolution''. Tucson: Arizona University Press. ISBN </ref> [[DNA]] studies show that the Columbian mammoth was a [[hybrid]] between [[woolly mammoths]] and another lineage descended from steppe mammoths. This hybridization happened more than 420,000 years ago. These mammoths did not live in the [[Arctic]] regions of [[Canada]], where the woolly mammoth l