In the future, cops may use a breathalyzer to find out where you were…

Every breath of air you breathe is swarming with untold numbers of tiny molecular compounds. By the time you're ready to exhale, many of these compounds will have swapped places with molecules in your body via your lungs. Through this exchange, these molecules wind up telling a story of where we've been and the sorts… » 9/28/11 1:40pm 9/28/11 1:40pm