For years we've been told that concussion is sport's bete noire, but what if the problem is something less obvious, yet more insidious? Dylan Cleaver reports in part two of a three-part series on the science behind head injuries in contact sports.

Roll up to Central Casting and ask for a scientist - the chances are you're going to get a man that looks a lot like Dr Lee Goldstein.

Bespectacled, thin and sporting a grey beard that is not quite neat, yet not unruly, Goldstein looks like a man who is at his happiest in a white coat in


The case against the Boston Group

The search for CTE