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pjc50's user avatar
pjc50's user avatar
pjc50
  • Member for 9 years, 4 months
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37 votes

Would an endothermic star be possible?

31 votes

How Long Could an "Eternal" Fire Last?

21 votes

What would modern IT look like if Silicon Valley had been completely destroyed in 1985?

20 votes

What would people on multi-generational ships wear?

20 votes

I duplicate the U.S. President. What happens?

18 votes

Why would a country employ a robotic police force?

17 votes

Wouldn't building down make more sense when colonizing a dead planet?

17 votes
Accepted

Where would an identity implant be implanted in the body? And what would make it secure?

16 votes
Accepted

Weapons for boarding spacecraft?

15 votes

How would a completely bulletproof clothing affect modern warfare?

14 votes

Plausible Reasons for usage of Combat Mecha

13 votes

How to convince people to teleport themselves?

13 votes

Advantages, if any, of deadly military training?

13 votes

Tank-Fighting Alien

11 votes

Society rules for marriages and love on multigeneration ship

10 votes

How does one prove rulership in a rural illiterate world

10 votes

What would happen if a society dumped radioactive nuclear waste into their oceans?

10 votes

How to make a metal with extraordinary property worthless?

9 votes

What is the viability of trains on planets covered in water?

9 votes

How can you build cities without cement?

8 votes

How could banks with multiple branches work in a world without quick communication?

8 votes

How would annually making all crime legal for 12 hours on the same day every year affect the US economy?

7 votes

What goods would be worth trading between Earth and Mars?

7 votes

What makes trading cities rich?

7 votes

Is this alternate history plausible? (Hard Sci-Fi, Realistic History)

6 votes

Would a large number of people simultaneously turning on a load of 3 kW be sufficient to bring down the electricity grid across 500 sq km?

6 votes

What's the most likely "post democracy" form of political government?

6 votes

How cheap do prosthetics have to be for poor people to afford them?

5 votes

Flight at supersonic speeds without an airplane

5 votes

What would it take for aircraft to fully replace naval vessels?