LOCUST SWARM PHOTOS: Plagues Triggered by Serotonin?

LOCUST SWARM PHOTOS: Plagues Triggered by Serotonin?
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Locusts swarm in Cancun, Mexico, in an undated photo.

In January 2009 scientists announced the discovery of a close connection between swarm behavior in desert locusts and the levels of the neurotransmitter serotonin in their bodies. The finding could lead to future swarm-management tactics for desert locusts, common in northern Africa and the Middle East, researchers say.

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—Photograph by Dario Lopez-Mills/AP
 
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