xkcd's What If?

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2023
2023x1
What if we aimed the Hubble Telescope at Earth?
Episode overview
If you pointed the Hubble telescope at the Earth, what could you see? Could you read over your neighbor’s shoulder? Or would it all just be a big blur?
2023x2
What would a magnitude 15 earthquake be like?
Episode overview
Since we usually hear about earthquakes with ratings somewhere between 3 and 9, a lot of people probably think of 10 as the top of the scale and 0 as the bottom. In fact, there is no top or bottom to the scale!
2023x3
What if NASCAR had no rules?
Episode overview
What if you ignored all the rules of car racing and had a contest which was simply to get a human being around a track 200 times as fast as possible. What strategy would win? Let’s say the racer has to survive.