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United States, North America
When he wasn't busy scribbling out the theory of relativity, Albert Einstein seems to have spent a fair amount of time writing spiritual letters.
NBC News
 | Stories
June 15, 2015
World
Scientists were aware of the phenomenon, but they had assumed those eruptions didn't have the explosive power to reach the stratosphere.
NBC News
 | Environment
November 20, 2014
United States, North America
Arthur C. Clarke would definitely approve this step towards his vision of space travel.
NBC News
 | Space
August 28, 2014
United States, North America
Climate researchers predict a temperature record unlike anything witnessed since 1900.
NBC News
 | Environment
August 27, 2014