English: Irish Elk or Giant Deer (Megaloceros giganteus) skull in Grant Museum of Zoology, London, England.

Living between 400000 and 7000 years ago from Siberia to Ireland, this deer had the largest antlers of any deer that ever lived - reaching 3.5 wide, despite the animal only being 2 m tall. In 2005, for the first time, the zoologists in the Department of Biology at the Grant Museum of Zoology, managed to obtain 11000 year-old DNA, which they used to show that giant deer are closely related to modern fallow deer. They also proved that they survived for 3000 years longer than previously believed, and probably became extinct through a combination of climate change and human hunting.