In this Tuesday, Oct. 29, 2013 photo, is monitoring equipment at the Large Underground Xenon Experiment at Sanford Underground Research Facility deep in an abandoned gold mine in Lead, S.D. Scientists... more 
In this Tuesday, Oct. 29, 2013 photo, is monitoring equipment at the Large Underground Xenon Experiment at Sanford Underground Research Facility deep in an abandoned gold mine in Lead, S.D. Scientists in the experiment to search for elusive and mysterious dark matter announced Wednesday the experiment found absolutely no evidence of dark matter in what is the most technologically advanced Earth-based search for the material that has mass but cannot be seen. They’ll keep looking for another year, but scientists were not optimistic about finding dark matter with the current setup and are already planning to build a more sensitive experiment on the site. (AP Photo/Rapid City Journal, Kristina Barker) less 
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Associated Press | Photo By Rapid City Journal, Kristina Barker
Wed, Oct 30, 2013 3:19 PM EDT