csiz
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How would interplanetary stock-exchanges work?
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11 votes

You could switch from continuous trading to a series of discrete auctions every x minutes. The key is that the order book of the current auction shouldn't be publicly available, only that of already ...

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What magic system would empower peace? (Retaining free will)
7 votes

Anything that would make the world more like the technological magic of today. I assume your setting is somewhere in the medieval period, then you can look at a graph like this one https://...

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Transhumans that replace eating with breathing
Accepted answer
5 votes

The current atmosphere is just fine As you're aware, plants are mostly carbon, and they get it entirely from carbon dioxide in the atmosphere. They get extra nutrients from the soil, but in much ...

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Alternatives to batteries for "residential" power?
4 votes

Rail Storage Besides pumped storage, the other option that uses the mountain terrain would be rail storage. As a bonus, it can also be used as the means of transport. The gist of it is a locomotive ...

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How can I estimate the maximum mass that can be safely handled in low to no g?
4 votes

I propose that you replace the weight limit in 0g with a limit on moving technique. The key is that putting something in motion and then stopping it will take the same amount of effort. So you encode ...

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Why would a very advanced Transhumanist Civilization ever need to have a military or wage wars?
Accepted answer
4 votes

Wars might not happen, but we will definitely have a military. Human psychology is this way because it is the nature of the world; not the other way around. I was reading waitbutwhy's essay on human ...

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Starship wreckage after uncontrolled reentry
2 votes

It might land almost intact, definitely recognizable as a ship Have you seen how slowly the Spacex Starship glides down? If it wasn't fuelled and ready to explode when it's fuel tanks rupture I think ...

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Is it possible to encode a message in such a way that can only be read by someone or something capable of seeing into the very near future?
2 votes

You have to copy a password right before it gets shown on the display. Say you have a small calculator that randomly chooses digits using some on-board entropy device (so actually random, not just ...

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Could a super-advanced but sociopathic alien civilization "blind-hack" Earth, even if it had never even heard of humans?
1 votes

Instead of hacking computers systems they could "hack" humans directly. Humans are after all information processing system; whatever universal hacking signal the aliens send should therefore ...

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How can the intelligence of a super-intelligent person be assessed?
1 votes

You can compare him to hyper intelligent entities that exist in the real world today. The only things that exhibit that so far are groups of people working together (but maybe AI will compete soon). ...

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How do I justify short-range engagements in space?
1 votes

Space is big and predictable. If you make your missiles pretty dumb so they move in roughly a straight line and at limited speed then they can always be avoided at long ranges. Alternatively you ...

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What good reason for a full metal humanoid robot with powerful hydraulic legs need to sit on chair?
0 votes

The same reason that humans sit on chairs, to relax I've been working with robots for a couple of years now and there's a big hidden issue that most people aren't aware of when it comes to actuator ...

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how can large reserves of mana not be made irrelevant by technology?
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Perhaps the amount of mana each person had was actually the same, but some people could use their limited mana much more efficiently, thus seeming like they'd have more of it. Now the mana stored in ...

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Future soldiers using musket-like weapons
0 votes

Force fields Maybe some sort of magnetic field or Star Wars like blue veil. The key point is that it allows passage for any slow moving objects but completely blocks fast moving projectiles. And it's ...

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How might my futuristic interstellar civilisation have missed a Dyson swarm on their doorstep?
-1 votes

The Dyson sphere is complete, and cooled to ~2.7 Kelvin Basically the star is completely invisible because all the star's radiation is captured by the Dyson sphere, and the sphere itself is kept cool,...

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