Greatest Scientist

Greatest Scientist

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"Ow! One of the petri dishes I left on the tower railing fell and hit me on the head! Hey, that gives me an idea..."

What If? is now on YouTube!
Check out the first video for the answer to
“What if we aimed the Hubble Telescope at Earth?”
and follow xkcd’s What If? The Video Series channel to be notified about each new video.