A soaring header that ends in the back of the net is one of football’s most thrilling moments. But behind the spectacle lies a growing scientific concern: every contact between head and ball sends energy back into the brain and researchers are...



A soaring header that ends in the back of the net is one of football’s most thrilling moments. But behind the spectacle lies a growing scientific concern: every contact between head and ball sends energy back into the brain and researchers are...