This past weekend, a group of Czech scientist and enthusiasts took the
popular geocaching hobby – where people look for hidden containers with
the help of GPS devices – to new heights, launching caches with GPS
trackers into the stratosphere. A carrier gondola, attached to a
stratospheric balloon, released the Stratocaches, also called maple pods
because of their shape, from 30,000 meters above ground, dispersing them at
random. The pods were meant to transmit their GPS locations upon landing
back on earth, for geocachers to locate them.