The eldest children in families tend to develop higher I.Q.’s than their siblings, researchers are reporting today, in a large study that could settle more than a half-century of scientific debate about the relationship between I.Q. and birth order.

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* I * am the eldest child.
So why are my younger siblings so much smarter than me??


(That's a rhetorical question - smartalec younger siblings can keep their comments to themselves thankyouverymuch!)