The aurochs, also urus, ure (Bos primigenius), is an extinct type of large wild cattle that inhabited Europe, Asia and North Africa. It is the ancestor of domestic cattle. The species survived in Europe until the last recorded aurochs died in the Jaktorów Forest, Poland in 1627.

During the Neolithic Revolution, which occurred during the early Holocene, there were at least two aurochs domestication events: one related to the Indian subspecies, leading to zebu cattle; the other one related to the Eurasian subspecies, leading to taurine cattle. Other species of wild bovines were also domesticated, namely the wild water buffalo, gaur, and banteng. In modern cattle, numerous breeds share characteristics of the aurochs, such as a dark colour in the bulls with a light eel stripe along the back (the cows being lighter), or a typical aurochs-like horn shape.