Thursday, May 30, 2013

How Do They Know?

Cicadas have begun to swarm along the East Coast, following 17 years living underground and sucking on tree roots. But the mechanisms and evolutionary reasons behind the timing of the insects’ emergence remain mysterious, according to Nature.


The cicadas currently climbing up out of the ground in the northeastern and mid-Atlantic coast are part of Brood II, one of 12 broods that emerge on a 17-year cycle. Three other broods further south emerge every 13 years. Read more by clicking the link below! 

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