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By Quora on at

Can You Shoot a Gun in Space? 

If it really came down to it, and you did have to defend yourself against an interstellar attacker, would a traditional gun actually be able to do the trick? Let's gaze at the idea, and crunch some numbers to find out.

What is a Time Capsule?

By Matt Novak on at

They can be buried, sealed in a vault or even shot into space, but time capsules mean different things to do different people. Here's your three-step guide to sticking things in the ground and waiting…