INTERSPECIES SEX: How Brown and Polar Bears Split Up, but Continued Coupling. “Dr. Lindqvist, said the DNA showed evidence of intermittent interbreeding between brown and polar bears from the time of the split until the present — most likely during periods of warming, when brown bears moved north and polar bears were forced onto land. In most brown bears the percentage of genetic material traceable to polar bears is 2 percent. But on the Alexander Archipelago, a 300-mile-long string of islands off the southeast coast of Alaska, the brown bears have 5 to 10 percent polar bear DNA, suggesting more frequent interbreeding.”

If they can breed together, though, is it really interspecies sex? Isn’t it more like ursine miscegenation? Not that there’s anything wrong with that . . . .