A driver experienced an unexpected delay after thousands of sheep crossed Highway 40 in northwest Colorado on Friday morning.

Colorado Department of Transportation ... A mother mule deer escorted her fawns. A black bear. (Yes, they can have brown coats.) A moose on the move. Smaller animals, like these otters, use ...

The black rhino has a pointed upper lip, while its white relative has a squared lip. The difference in lip shape is related to the animals' diets. Black rhinos are browsers that get most of their ...

Evolution. 74: 1498-1513. Taylor SA, Curry RL, White TA, Ferretti V, Lovette IJ. 2014. Spatiotemporally consistent genomic signatures of reproductive isolation in a moving hybrid zone. Evolution 68: ...