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Hornets suffocate in bee ball

Spike in carbon dioxide combined with heat may make honeybees' enemies vulnerable

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5:32pm, July 2, 2009

Call it death by a thousand breaths. When hundreds of honeybees envelop a giant, enemy hornet in a ball, the bees aren’t just putting on the heat, as researchers had thought. Carbon dioxide levels spike along with temperature, fingering suffocation as the hornet’s cause of death, scientists report online and in an upcoming Naturwissenschaften.

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