Notoriously aggressive, hippopotami are some of the deadliest land animals to humans, causing around 500 casualties annually. Most hippo-related attacks occur when people encroach upon their territory ...

Some are killed for their tusk-like teeth, which can grow up to a foot or longer. (Though smaller than elephant tusks, hippo tusks don’t yellow with age. One of George Washington’s sets of ...

Habitat loss and degradation, drought, poaching and the international trade of hippo parts, including their teeth, skulls, ivory, skin and meat, all threaten this keystone species. “The iconic hippo ...