http://www.pnas.org/cgi/content/abstract/0803317105v1
Submitted April 16, 2015 at 06:15PM by ZhouLe http://www.reddit.com/r/todayilearned/comments/32ss94/til_that_using_astronomical_data_it_has_been/
Submitted April 16, 2015 at 06:15PM by ZhouLe http://www.reddit.com/r/todayilearned/comments/32ss94/til_that_using_astronomical_data_it_has_been/
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