helmet debate

The helmet debate thread has been on moderation for over a year now is there any chance it can/will be taken back off again? The thread was mercilessly trolled by a couple of individuals who, having achieved their aim of effectively getting the thread locked, have barely posted in there since...

Bell introduced the modern polystyrene cycling helmet in 1975 (before then bike racers, rugby players, aeronauts and mountaineers wore protective leather caps). First constructed to protect the skull by crushing on impact, there has been little aesthetic or material innovation in their design...