The animal kingdom's most popular gay couple no longer exists, now that Silo and Roy, the cohabiting penguins of Central Park Zoo, have called it quits. The pair rose to recognition six years ago when they "came out" with their same-sex relationship. Since then, they successfully hatched and raised an adoptive chick, after unsuccessfully trying to incubate a rock.

A Fort Lauderdale veterinarian had seen strange items in the stomachs of dogs before, but a 13-inch serrated knife that was swallowed by a 6-month old puppy was a new one. "I was just flabbergasted," says veterinarian Jon-Paul Carew of Imperial Point Animal Hospital in Fort Lauderdale, to the South Florida Sun-Sentinel

A new study finds female greater horseshoe bats share mates with their mothers and grandmothers, but somehow avoid incest. Study leader Stephen Rossiter of the Queen Mary, University of London, says the females will not mate with their fathers, but will mate with their mother's partner, only when the mother has switched partners. Rossiter suggests this strange behavior evolved to tighten relationships within the colony.

Hector Duarte Jr. - All Headline News Staff ReporterStudy leader Stephen Rossiter of the Queen Mary, University of London, says the females will not mate with their fathers, but will mate with their mother's partner, only when the mother has switched partners.

The Alaska Zoo plans to use a 16,000-pound treadmill specifically built for its overweight elephant Maggie. Zoo director Tex Edwards is optimistic she can get the more than 4-ton animal to use the machine.