(Siblings can have surprisingly different DNA ancestry. Here's why.) Birth order has also long determined inheritance rights and royal lines of succession, as in the British monarchy which has ...

This year's NFL Pro Football Hall of Fame class only featured four former players, a bit of a surprise considering how big last year's class was. However, these four players are icons in the game ...

This year's NFL Pro Football Hall of Fame class only featured four former players, a bit of a surprise considering how big last year's class was. However, these four players are icons in the game, ...