There's a gang war happening in the Luangwa Valley in Zambia, a battle among hippos for territory, dominance, mating rights, and survival. The reason? Dry season: a seven-month drought that forces over 30,000 hippos to the deepest part of the river to stay wet and cool. Follow these three-ton beasts as they fight lions, crocodiles, and other hippo gangs, struggling to stay alive until the next rainfall. Only then can... see more