Migrating Monarch Butterflies 'Nose' Their Way To Mexico, Neurobiologists Discover

Since the late 1970s scientists have studied the fascinating annual migration of monarch butterflies from across eastern North America to a single location in Mexico. Neurobiologists have now found that a key mechanism that helps steer the butterflies to their ultimate destination resides not in the insects' brains, as previously thought, but in their antennae, a surprising discovery that provides an entirely new perspective of the antenna's role in migration.

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