The evolution of the helmet
83: Percent of avalanche accidents involving avy-trained skiers and snowboarders that were due to poor decision making, rather than subtleties of the terrain or snowpack.
3: Inches closer to a helmeted cyclist a motorist will drive.
0: Drop in risk of an ACL tear for someone who recreates wearing a knee brace.
50: Percent likelihood of being killed or injured by a grizzly while defending yourself with a gun. (Likelihood with bear spray: 8 percent.)
0: Protective benefit of an expensive bike helmet over a cheap one.
0: Drop in annual fatal ski accidents at resorts since the widespread adoption of safety helmets.