The goals of a major push for football helmet safety should bring improvements, but the overall results remain unpredictable.
How new and improved sports protection equipment could help in concussion prevention.
The vast majority of traumatic brain injuries are concussions. Researchers talk about the problem of these head injuries in sports.
Ongoing studies try to quantify the risks and benefits of contact sports.
The 100th Indianapolis 500 will continue the tradition of testing tomorrow's commuter technology on the track.