“I had to train to fight a grizzly bear. You’re going to watch it. It was a Kodiak bear. It stood nine-foot tall,” the 40-year-old actor said, to host Julie Adenuga’s disbelief.

While you may not notice it unless you are looking at a polar bear and Kodiak bear side by side, there are some key differences in their sizes and weights. For example, the average polar bear ...