Everyone loves fireworks, except for small children and dogs, but what exactly goes into making the explosive and beautiful balls of fire?

Watch as Joey Chestnut secured his 16th Nathan's Famous Hot Dog Contest championship with ease a 4th of July tradition and spectacle like no other.

Take a look back as John Brenkus and the "Sport Science" team examine how competitive eaters can consume such massive quantities.

Trace the rise and fall of the Mongol Empire which, under the leadership of Genghis Khan, became the largest contiguous land empire in history.

Learn about the life of the ruthless Mongol conqueror of the late 12th and early 13th centuries in this full biography.