Crazy fun US (retired) Astronaut/consultant. Helping w/STEM, S Media Q&A/space, love NASA, inventor of Twitpic POTD! http://t.co/vrpaKgQLyW
698 days ago
Second POTD since i did a #RR last time! Sorry!
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NASA says „Copper mines“. My details: the Pima Mine in Sahuarita, AZ, 32.000215,-110.999502, a few miles south of Tucson.
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