Buzz Aldrin tweets picture posing with dummy "Stephen Hawking".

"Accept now that all you have seen from the day of your birth on the surface of the earth, to the present, are wonderful only because the finite mind of man is confused with fragments of evidence, that, from whatever direction we meet them, spring from an unreachable infinity."

"There was a man who could create what could not be imagined. A temple so great you questioned if it was built with human hands. A man who built an idea into the greatest force the world has ever known. A world built from a single word. I care not for the folly of man but for the end of human contention."