The 13-year-old lion was not only a tourist favorite, but also, a research animal. The beloved lion was being studied by the Oxford University Conservation Unit.
Author Amy Stewart considers the mosquito the most wicked bug of all because of the amount of disease it spreads. Stewart is author of “Wicked Bugs: The Louse that Conquered Napoleon’s Army and other Diabolical Insects.”
This segment originally aired in 2011.