Today: In May 1961, President John F Kennedy stirred America and the world with these words: I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the Earth. Just eight years later, NASA did just that with astounding benefits for science, technology and the world economy. Now, a group of leading scientists, innovators and economists has identified our eras moonshot: To replace fossil fuels with clean-energy...