Donkeys and mules may look alike, but they’re not the same animal. Discover some key differences in these unique and valuable animals.

BISMARCK, N.D. (AP) — Reproduction of mule deer in North Dakota is at record-low levels for a second year in a row, and a state biologist said another mild winter is needed to help the animals rebound ...

SEATTLE -- Three young mules who are the first members of the horse family to be cloned are all healthy, normal and energetically enjoying life, say researchers who put them on display here Sunday.