QI : Quite Interesting "They used to pit grizzlies against bulls, but the bearsalways won easily by using their paw as a club. Tired with the lack of suspense, they shipped in Africanlions to raise the stakes. The lions had a reputation for rushing fiercely into the attack and looking very promising at the outset, but in the event the grizzlies killed them as easily as they did the bulls. The bear’s edge lies in deploying its enormously strong bone density against the thin skull of the lion (lion strength is more muscular than structural).Lions and tigers bring down their prey by applying a windpipe lock, but they never got the chance to use this technique as the bears would flatten them with a hammer blow first." It's a documented fact that lions have a light bone structure.