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Americans heard about atomic bombs long before one was actually built. US Department of Defense

Even before Hiroshima, people knew the atomic bomb

News of the Hiroshima bombing spread quickly to the US public but, thanks to science fiction writers, atomic bombs were discussed more before the war began than during it.
Six of the 17 declared 2016 Republican U.S. presidential candidates before the start of a forum August 3, 2015. Brian Snyder/REUTERS

The withering of the culture war

Wedge issues that have divided American voters for years are losing their edge.
Will alternate solar technologies get a boost if solar overall grows? Walmartcorporate/flickr

Do we need a solar power technology breakthrough?

Hillary Clinton’s renewable energy plan is ambitious but, on a technical level, doable. Would it foster more solar technology innovation?