National Geographic: Nature Untamed

Cannibal Hippos (1x5)

Air date: Aug 12, 2009

The mysterious death of hundreds of hippos at the Queen Elizabeth National Park in Uganda sparks a "whodunit" on a national scale. In 2004, a park research ranger discovers the corpses of two hippos, bloated and decomposing. The cause of their death is uncertain. Yet in the next days and weeks, the natural paradise is blighted with more and more corpses. As the body count rises, an international team of scientific investigators struggle to find out the cause.