It was a short but potent declaration – 126 characters to be exact: “Aliens might be surprised to learn that in a cosmos w/ limitless starlight, humans kill for energy sources buried in the sand.” The statement, posted to Twitter in January 2013, came from the American astrophysicist and scientific celebrity Neil deGrasse Tyson. In addition to his promotion of astronomy and science education in the US, Tyson has become an outspoken commentator on the threats of climate change and the promises of alternative energy. In his 2014 reprise of Carl Sagan’s 1980 documentary, Cosmos, Tyson ...
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