After crossing the bricked finish line on Sunday, the winner of the Indianapolis 500 will drive into the winner’s circle, be presented with a celebratory wreath and take a swig from a cold bottle of milk. The latter is one of the grandest traditions in sports, but also one of the most confusing. Why milk? Why is it in a bottle? And (this one was actually asked by a girl I knew in college) has it been sitting in the sun all day?…continue reading on Yahoo! Sports.