The Irish elk thrived for over 7,000 years. Its range extended from China to, as the name suggests, Ireland. Standing more than a meter and a half (6.9 feet) at the shoulder and weighing up to 700 kilograms (1,543 pounds), it was, by far, the largest elk around – before or since. What made it truly spectacular though were its antlers at 3.65 metres (12 feet) across. In sexual conquest and in battle, antler size was everything. And then, 11,000 years ago, this magnificent animal went into sharp decline. There are a number of theories to explain its extinction.