There are a few reasons why the aurochs went extinct. First, they were hunted by humans for their meat and hides. Second, they competed with domesticated cows for food and resources. Third, their habitat was destroyed as humans encroached on their territory. The aurochs was once a widespread species, but human hunting and habitat destruction led to its demise. The last known aurochs cows were killed in the 17th century, and the last bull died in 1627. The extinction of the aurochs is a cautionary tale about the need to protect wildlife and preserve habitats.