Medicine & TechnologyScientists have developed "backpack" computers to track small animals' social behavior, which contains sensors that has the same size as the fingertip.
Two smartphone-based systems that track users outside the visibility of GPS and recognize various objects found on the road scene in real time have been developed.
Thanks to the jolly volunteers at NORAD, the original Santa trackers, and Google, the more recent Santa trackers, kids only need to log onto a website, app, Facebook or Twitter and they can find out where Santa is at that instant.