Planning the next family reunion

So, basically, it's all my fault:

This will come as little surprise to most parents: Children who have older brothers tend to become more aggressive than those with older sisters, according to a new study.

Sorry, Larry and Judy; it's all biology. You probably won't like this, either:

Being the oldest child in the family has its perks: later bedtimes, no hand-me-downs, and, according to a new study, a higher IQ.

If you have trouble grasping that, just think a minute. It will come to you.