Irish elk (thing)

Among the largest deer ever known, this animal was up to 3.5 meters long, 2.1 meters tall at the shoulders, and its antlers spanned as much as 3.6 meters between from tip to tip. The antlers alone could weigh as much as 40 kilograms. Only the males had antlers, which they shed once a year. They lived in open fields and became extinct after the last ice-age (about 8,000 years ago). The reason is obvious: They need the open fields, because they can't move in the forest.