Jeffrey Kluger

Scarily, football helmets, which do a fine job of protecting against scalp laceration and skull fracture, do little to prevent concussions and may even exacerbate them, since even as the brain is rattling around inside the skull, the head is rattling around inside the helmet.

Being a pop star is something I don't think I'm very good at. I'm worried it's making me too paranoid, because all of a sudden, life has become this constant assessment. When you put something out there and people get to hear it, then those people react to it, socially, culturally.

Though builders may build, in the main they follow the plans of architects. Teachers teach, but they must have a text. Politicians govern, but only upon the flow of commentary that raises them up or casts them down.