Elk are the second largest animals in the deer family. Fully grown male elk, or bulls, average about five feet tall at the ...

But natural selection does not explain features that would seem to hinder an animal's survival, such as the male peacock's extravagant plumage or a male elk's heavy and unwieldy antlers.

In Wyoming, 14% of all deer and elk tested last year were positive for chronic wasting disease (CWD), the Wyoming Game and ...