An alpha hippo is challenged by two outside males. A coup by two hippo bulls is out of the ordinary, but this is no ordinary year, as a once-in-a-lifetime drought spurs unusual animal behavior. - ...

As extreme drought overtakes Katavi, predators struggle to find food. Lions rarely hunt hippos, but hungry lions can do crazy things. - [Narrator] Hippos outweigh lions ten to one and are rarely ...