Grizzly bears enter polar bear territory

Image by Alaskan Dude via Flickr

Discovery.com reports on the makings of what is sure to be a showdown for the ages:

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?