Video: NASA Drops "Spiders" Into Volcano (National Geographic)
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NASA Drops "Spiders" Into Volcano
August 13, 2009
NASA helicopters have lowered about a dozen monitoring "spiders" in and around Mount St. Helen's volcanic crater to better predict major eruptions.
August 13, 2009
NASA helicopters have lowered about a dozen monitoring "spiders" in and around Mount St. Helen's volcanic crater to better predict major eruptions.
Source: http://video.nationalgeographic.com/video/player/science/ind...">National Geographic
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