See the full episode at http://video.pbs.org/video/1811431815Hunting down the most venomous animals to reveal their medical mysteries. Aired February 23, 2011 at 9pm on PBS http://www.pbs.org/wgbh/nova/nature/venom-natural-killer.html See more full episodes of NOVA online at http://video.pbs.org/program/979359664/
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