Paul Rouse: The Dirty Football Player and a history of the helmet 

The violence on display in NFL games has always been a key part of the sport's attaction. 

OLD SCHOOL: Harold "Red" Grange of the Chicago Bears in 1925. Pic: Universal History Archive/Universal Images Group via Getty Images

There is a certain genius in writing newspaper headlines. In the modern world, it is obviously essential to the pursuit of ‘clicks’.

For decades, though, the ability to sell a story – and by extension sell a paper – owed much to a good headline.