My wonderful Santa sent me "What If?" by the creator of xkcd. The book scientifically answers a bunch of ridiculous questions. Here are a few examples:

What would happen if you made a periodic table out of cube-shaped bricks, where each brick was made of the corresponding element?

Is it possible to build a jetpack using downward firing machine guns?

Let's assume there's life on the nearest habitable exoplanet and that they have technology comparable to ours. If they looked at our star right now, what would they see?

This book is so weird, but so cool and I'm super excited to read it. Thanks so much, Santa!!