The U.S. has closed its southern border again to livestock imports, saying a flesh-eating parasite has moved further north in ...

The U.S. Department of Agriculture works to neutralize -- again -- the flesh-eating larva of the New World Screwworm fly.

The U.S. has closed its southern border again to livestock imports, saying a flesh-eating parasite has moved further north in ...

Conservationists were heartened to report the sighting of a rare Egyptian vulture breeding and feeding its chick in an ...