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Next airing Mon May 16, 7 p.m. ET

Animal Apocalypse

Mass animal deaths are occurring across the globe. Should we all be freaking out about the end of the world? Or are there logical explanations? World's Weirdest: Animal Apocalypse features the puzzling cases of animals behaving bizarrely: millions of mice overtaking farms and buildings, hundreds of whales beaching on a shore, thousands of blackbirds suddenly raining from the sky and frogs spontaneously exploding.