“As I take man’s last step from the surface, back home for some time to come (but we believe not too long into the future), I’d like to just say what I believe history will record: That America’s challenge of today has forged man’s destiny of tomorrow. And, as we leave the Moon at Taurus-Littrow, we leave as we came and, God willing, as we shall return: with peace and hope for all mankind.”

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- Commander Gene Cernan

It was forty years today (at 22:54:37 UT) that human beings left the moon for the last time. http://boingboing.net/2012/12/14/we-left-the-moon-40-years-ago.html