PHThere's a treasure hunt happening in space
You do not have permission to view the full content of this post. Log in or register now. that involves players deciphering clues and going on stash-seeking adventures, using GPS and a geocaching app—kind of like a digital/analog combination scavenger hunt. As of 2008, there's even You do not have permission to view the full content of this post. Log in or register now. on the International Space Station.
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