Part of the shows Science Question and Answer - New Horizons Mission and The Best Naked Science
Clementine in Cambridge asked:
Who would win a fight between a hippo and a polar bear?
I think that polar bears are a lot faster than hippos, so that element of nimbleness would give it a great advantage. Although I guess if they got close enough, a hippo is a really vicious animal. I think that more people are killed by hippos in Africa than they are by lions and tigers and actual carnivores.