A typical bike helmet protects your head with polystyrene foam—the same cheap material used in coolers and old takeout packaging. In a crash, if the helmet fits properly, that foam can reduce the risk ...

Researchers have developed a new, lightweight foam made from carbon nanotubes that, when used as a helmet liner, absorbed the kinetic energy caused by an impact almost 30 times better than liners ...

Drop tests from as high as two meters show air bag helmet may reduce impact by as much as six-fold compared to traditional bike helmets, report investigators. Stanford bioengineer David Camarillo ...

Contributing editor Megan Michelson is an award-winning journalist who covers travel and the outdoors for a wide range of publications, including Outside, The New York Times, and the San Francisco ...

Stanford bioengineer David Camarillo knows all too well that bicycling is the leading cause of sports- and activity-related concussion and brain injury in the United States. He's had two concussions ...