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 ...

As any coach or sports medicine expert will tell you, when an athlete receives a blow to the head, their saying that they feel OK doesn't mean that they don't have a concussion. Particularly in sports ...

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 ...