Nice piece explaining helmet use and why we should be careful about manditory helmet laws – by an MD no less. He doesn’t really point out the reductio ad absurdum in most helmet arguments but I’ll forgive him.

Plastic shells keep our heads from coming open, but they also deter us from riding bicycles. And riding bicycles is good for people and Earth.

The Bike Helmet Paradox – James Hamblin – The Atlantic via

The Freakonomics of Bike Helmets