TREND A globe-trotting treasure hunt in which players search for hidden prizes using handheld navigation gadgets
HOW IT STARTED The military opened up its global positioning system to civilians, and Christmas came early for nerds everywhere
JUDGMENT CALL Anything that exposes geeks to sunlight can't be bad
Right now, in the middle of a Joshua-tree forest in southwestern Utah, there's a Folgers coffee can containing a pen, a notebook and a large rubber snake. It's just one of hundreds of prizes in the global scavenger hunt known as geocaching. All you have to do to win it is to make...
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