Episode 514: Q&A 84: Is It Cheaper To Build Stuff In Space? And More...

00:18 Is it cheaper to build things in space?

02:24 Is space rolling downhill?

05:13 What would a citykiller look like?

07:33 Farts in space?

08:54 Space-based interferometers

10:44 How much of the Universe's life has already happened.

12:42 Why not invest in stargates?

13:28 How fast to exit a black hole?

14:42 Could balloons go to orbit?

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