Nature Shock: Killer Elephants

Documentary series examining freak occurrences in the natural world. This edition looks at the unusually high death rate among elephants at the Periyar Wildlife Sanctuary, Kerala, India, between 2009 and 2010. When forest guards found that young, largely female elephants were dying in suspicious circumstances, an investigation first suggested poaching as the cause. A team of government scientists, however, had a more disturbing theory.