all rocks, hard and soft
Monday, October 6, 2014
Tuesday, September 30, 2014
Monday, September 29, 2014
Phreatic Eruption in Japan missed by sensors, why?!
http://www.wired.com/2014/09/30-hikers-die-ontake-eruption-japan-happened/?mbid=social_twitter
Thursday, September 25, 2014
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