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Climate change hits loveable lemmings

Cross posted from the Great Beyond Let us get one thing clear right at the start: lemmings do not commit mass suicide by leaping off cliffs into the sea. However, their populations do undergo massive size fluctuations, leading to mass migrations where the cute critters may go swimming to find new food sources. At least, they used to undergo massive population explosions. In a paper published this week in Nature a group of researchers analyse the absence of such events since 1994. The culprit, you guessed it, is climate change. Nils Stenseth and colleagues show that changes in winter weather 

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