This shows that teens may find it more difficult to control risky behavior when their friends are around, or in situations where they are extremely angry.
In Ireland Cardinal Sean Brady, the primate, has admitted that he was present in 1975 when two teenage boys were persuaded to sign oaths of silence about their abuse by Father Brendan Smyth.
At the 35k mark, Russell and a few friends have managed to gather up a group of teenage Japanese cheerleaders to root for Tame through the final stretch of the marathon.
The actions of both the young man and the teenage mother are "cultural," he suggests, because they follow from the individual's perceptions of how society works.
In particular, scientists understand much more about the neurobiology of the teenage brain and the risks of experimenting with drugs and alcohol during adolescence.
He adds that there is a unique feature of the teenage brain that drives much behavior during adolescence: the teen brain is primed and ready for intense, all-consuming learning.
But I have to say thank you for the teenage-shagging Elvis, and the wife-beating Frank, because in a world without men, I believe the music would be rubbish.
But I can see no reason why the simple statistical fact that there are going to be a great many more teenagers in the next few years should be cause for anything more than the usual alarm.