If Big Cats Exist, Why Aren't There Big Dogs ?

There's no wild dog on Earth that comes close to a lion or a tiger — and it's not bad luck. It comes down to how each animal hunts: solo ambush vs. team endurance chase. This video breaks down why cats got to be giants and dogs never did, what a grizzly bear has to do with it, and how humans built the "big dogs" nature refused to.