Mass Animal Die-Offs Are on Rise, Killing Billions and Raising Questions

National Geographic: We're not talking about a few dead fish littering your local beach. Mass die-offs are individual events that kill at least a billion animals, wipe out over 90 percent of a population, or destroy 700 million tons-the equivalent weight of roughly 1,900 Empire State Buildings-worth of animals. And according to new research, such die-offs are on the rise. The study, published this week in the Proceedings of the National Academy of Sciences, is the first to examine whether mass die-offs have increased......

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