What a great week! A comet landing and now this. Science is so freaking cool!
Rappelling Researchers Explore Mysterious Siberian Sinkhole : News : Nature World News: http://t.co/FollXbzfIL — justa farmer (@justafarmer4) November 15, 2014
Rappelling Researchers Explore Mysterious Siberian Sinkhole : News : Nature World News: http://t.co/FollXbzfIL
— justa farmer (@justafarmer4) November 15, 2014