Grizzly bears enter polar bear territory

Image by Alaskan Dude via Flickr

Grizzly bears have entered polar bear territory, setting the stage for deadly bear versus bear encounters to come, suggests a study recently published in the journal Canadian Field Naturalist.

Should the bears meet, the grizzlies could do some serious damage.

No doubt about that, but polar bears have a definite size advantage. In one-on-one confrontation, my money's on the polar bear. My question is this: what happens if, rather than fighting, the two species breed? And fuse into some unholy sort of unstoppable ultra-bear with an insatiable taste for human flesh?