Brick Archway

Brick Archway

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The TI-86 was bad enough. I don't know how I'd have gotten through high school if I'd had a laptop+wifi.

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.