Elk deer are the largest. A genus of ancient mammals. Life in the three million years to twelve thousand years ago, China in Hebei, Shanxi, Inner Mongolia, Beijing Zhoukoudian Beijing manfossils, also many caves. Often in a peat bog, the ancient deer horns staggering, the angular width,usually 2.5 meters, so it is called megaloceros.
Moose antlers is huge, there are several theories about the evolution of the. One refers to thechoice of continuous antlers and strong, because the Bucks have to fight to get the deer, soincreasing; then due to excessive large that moose cannot support extinction. But this theory hasnot verified in 1974 before too much.
Stephen Gould (Stephen Jay Gould) in 1974 for general deer, deer not only the size is larger, the proportion is relatively large antlers, which is derived from allometric growth, or abnormal growth ofbody and antlers during the development rate. In fact, moose body just for such a great angle. But the choice is not no effect, but the moose ancestors had a large enough angle to evolution. Gouldrefers to the size and location of antlers is to maintain sexual selection: this pair of antlers in the form is not suitable for the fight, but in the position of the skull in the opposite sex and attraction to attack the enemy is perfect. Unlike other deer deer, they don't have to rotate the head to display the angle of beauty, only from the front you can see.