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Old 09-28-2009, 02:23 AM
 
Location: Michigan
29,391 posts, read 55,574,845 times
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Scientists have finally located the 24-hour clock that guides the migration of monarch butterflies. Instead of being in the brain where most people expected, it turns out the circadian clock is located in the butterflies’ antennae.

Every fall, monarchs make an impressive 2,000-mile trek south, using the sun to guide them to the exact same wintering spot in central Mexico.

Butterflies Use Antenna GPS to Guide Migration | Wired Science | Wired.com
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