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 Geocaching: Treasure Hunting in the 21st Century  Computers, satellites and the outdoors combine to make this treasure-hunting game one for the 21st century. ADDITIONAL FEATURES: |
 Photo by Scott Kardel © Caltech/Palomar Observatory 
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Geocaching: Treasure Hunting in the 21st Century Computers, satellites and the outdoors combine to make this treasure-hunting game one for the 21st century. ADDITIONAL FEATURES: |
Photo by Scott Kardel © Caltech/Palomar Observatory
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