|Range||Except Africa, Southern America and Polar Regions|
The house mouse (Mus musculus) is a small mammal of the order Rodentia. The word "mouse" comes from Middle English mous which is from Old English mus which is descended from Proto-Germanic mūs which ultimately comes from Proto-Indo-European múh₂s meaning "mouse'. Although a wild animal the house mouse has benefited greatly from associating with human habitation to the point that truly wild populations are getting less and less common than the semi-tame populations near human habitation. The house mouse has been domesticated as a pet and as a laboratory mouse. The complete mouse reference genome was sequenced in 2002.