Interesting fact and if you guess it, I will personally mail you both a check for $2,000. (And by guessing, I mean you don't already know the answer.) After high school football, what is the second most dangerous sport?

expensive materials means that advanced lithium-ion batteries still cost about $650 per kilowatt-hour of usable energy. At that level, the 4-kWh battery pack for a Nissan Leaf costs more than some cars.

The answer: girl's soccer. muahahahahaha. no way you were guessing that.