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.

When a bull elephant and hippo meet in a watering hole, it's not always a peaceful coexistence. In the accompanying footage, ...

With a large barrel-shaped body, short legs and huge skull, the hippo is the third largest land animal in the world. Adult bulls can reach 4–5m long and weigh four tonnes (4,000kg). Theyhttp ...