Every species perceives the world differently, and the distance at which animals can identify humans varies widely. Some rely on eyesight, others on scent, and many use a combination of senses.

Millenia ago, when much of North America was covered in ice, a distant relative of a white-tailed deer grazed its way down a limestone ridge to the southeast edge of the continental U.S. Over time, as ...

The endangered deer species on the Florida Keys is being threatened by rising seas, and that is raising uncomfortable questions for wildlife managers. The deer are the size of a golden retriever. On ...