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NOVA - Rat Attack

Rat Attack Rat Attack
Why do huge swarms of rats overrun a bamboo forest in India once every half-century?
http://video.pbs.org/widget/partnerplayer/1051969546/?player=WGBY-PBS&w=512&h=288&chapterbar=true&autoplay=false Why do huge swarms of rats overrun a bamboo forest in India once every half-century? /episodes/get/2392 /episode/2392 NOVA: Rat Attack /episode-player/2392
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