[Overtime Q&A] Telescopes Shooting Lasers, Assembling Telescopes in Space, Growing Plants on Mars

What are those lasers shooting out from telescopes? Can we build a space elevator? Could we grow plants in Mars regolith? Why not assemble telescopes in space? Answering all these questions and more in this week's Overtime Q&A.
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00:00 Start
00:50 Could we plant in Mars regolith?
02:35 What is the bright laser coming out of telescopes?
06:08 Will telescopes be assembled in space?
07:59 Would we have our money's worth if JWST broke?
08:45 Any updates on space elevators?
12:52 Will Breakthrough Starshot happen soon?
15:24 What about a low-mass black hole?
16:37 Could Gemini North and South do optical interferometry?
19:06 Thoughts on Europa?
21:46 How do galaxies collide if the Universe is expanding
22:45 Could an LCD screen be a coronagraph?
26:46 How does light travel farther than 13.8 billion light-years?
28:19 Are we looking for machine civilizations?
📺 VIDEO VERSION
https://youtu.be/CB5JBkDqmu0
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