Every season several football players miss a number of games after absorbing vicious blows to the head.
According to one study, the skulls of some Americans have actually grown over the past 120 or so years.
We click 'Save' constantly, but what's actually going on when we do?
How tiny stones inside our heads tell us which way is up...
For years, schools have been turning kids away that have head lice. Learn why should they stop this practice.