Prehistoric deer grew to some enormous sizes and had some incredible antlers. Here are some more of these giant and weird ...

The giant deer required abundant ... “The males would have really struggled, having to grow those antlers every year,” says Lister. But the cold spell’s impact on females may have been ...

And this group of three bucks (all males, which is common except for during the fall rut, when females and males group ...

These antlers were as heavy as a grown man ... and the impact of human activity shaped the destiny of this giant deer, just as they shape the fate of animals today. Its extinction invites us ...

Though the deer may look harmless, the animals are skittish and can use their hooves and antlers to defend themselves when startled, the park service said. Bucks are prone to aggressive behavior ...

A new species of fallow deer, Dama roberti, described by Adrian Lister and Marzia Breda in 2013. Left: fossil skull and antlers from Pakefield, Suffolk. Right: reconstruction by David Waterhouse.