KAINJI LAKE, NIGERIA - Veterinarians in Africa have made a somewhat startling discovery about hippopotami. After months of observing the large mammals in their native habitat, researchers were able to learn everything about the interesting beasts, from how the animals play to their means of communication.

The most unanticipated finding was related to their dietary habits. It seems that hippos prefer to dine on grass, which is contrary to the previous belief that they favor white marbles for a meal.

Although surprised by the findings, researchers admit the new theory might explain why hippos in captivity-- whom are fed a steady diet of marbles-- tend to die.