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Top Questions

40 votes
14 answers
8k views

Could a Black Market exist in a cashless society (digital currency)?

20 votes
17 answers
7k views

What is the safest way to camp in a zombie apocalypse?

12 votes
22 answers
5k views

What goods yield the best profit for time-travel arbitrage?

15 votes
13 answers
4k views

What scientifically plausible apocalypse scenario, if any, meets my criteria?

13 votes
15 answers
5k views

Why bother with planetary battlefields?

25 votes
7 answers
8k views

if people are bred like dogs, what can be achieved?

8 votes
16 answers
4k views

How could warfare be kept using pike and shot like tactics for 700 years?

9 votes
10 answers
4k views

How fast would unrest spread in the Middle Ages? [closed]

13 votes
9 answers
4k views

How to turn a desert into a fertile farmland with engineering?

14 votes
7 answers
4k views

Would you be able to look directly at the Sun if it were a red giant?

5 votes
8 answers
3k views

Why are metal ores dredged from coastal lagoons rather than being extracted directly from the mother lode?

10 votes
10 answers
3k views

Everything has a tiny nuclear reactor in it. How much of a concern are illegal nuclear bombs?

7 votes
10 answers
3k views

How could double damage be explained in-universe? [closed]

14 votes
5 answers
4k views

Is it possible with modern-day technology to expand an already built bunker further below without the risk of collapsing the entire bunker?

11 votes
8 answers
3k views

Mechanism behind a pink human skeleton

16 votes
9 answers
2k views

Would this telescope be capable to detect Middle Ages Civilization?

13 votes
6 answers
3k views

Would a spaceport on Ceres make sense?

15 votes
5 answers
2k views

Would an industrial level society be able to visually identify orbital debris from a destroyed mega structure?

4 votes
6 answers
2k views

Is a desert planet with a small habitable area possible?

6 votes
9 answers
3k views

Would it be possible for a living being the size of a planet to survive? [closed]

2 votes
5 answers
3k views

Solution for a modern nation that mustn't see themselves or their own reflection

6 votes
13 answers
1k views

What kind of pressures would make a culture force its members to always wear power armour

12 votes
6 answers
3k views

Can a planet have a warm, tropical climate both at the poles and at the equator?

7 votes
4 answers
2k views

How could breastfeeding/suckling work for a beaked animal?

4 votes
6 answers
2k views

Natural mechanism behind burning oceans

7 votes
4 answers
2k views

Airtight beaks?

6 votes
5 answers
2k views

Can I cause a star to go supernova by altering the four fundamental forces?

7 votes
6 answers
1k views

Can my necromancer have this bridge built with those constraints?

5 votes
8 answers
1k views

Practical Combat Pipe

4 votes
5 answers
2k views

Pregnancy in a hibernated state [closed]

6 votes
4 answers
2k views

Would a "plug and play" prosthetic be possible?

5 votes
6 answers
1k views

The use of Bio-weapons as a deterrent?

6 votes
10 answers
871 views

Ideas for an alternative to nuclear weapons as a deterrent? [duplicate]

4 votes
6 answers
2k views

Plausible reasons for the usage of Flying Ships [closed]

10 votes
2 answers
2k views

Weather on a Flat, Infinite Sea

4 votes
6 answers
1k views

Navigation on Mars without Martian GPS

7 votes
3 answers
1k views

What if Mars were the same size as Earth with an atmospheric pressure of 1 atm?

5 votes
3 answers
902 views

Could we control our personal reality

4 votes
8 answers
394 views

What evolutionary pressures would lead to massive differences in intelligence between the sexes?

5 votes
7 answers
1k views

How to arrange three identical habitable planets in one solar system in similar or, if possible, same orbit?

4 votes
4 answers
822 views

What are some plausible means for increasing the atmospheric pressure on a post-apocalyptic earth?

5 votes
3 answers
908 views

Would human-shaped sperm cells work?

3 votes
5 answers
619 views

Air magic only used to decrease humidity and improve living conditions?

0 votes
5 answers
275 views

How do I explain why my planet has only one continent? [closed]

8 votes
3 answers
1k views

Would moving the equator to the Tropic of Cancer increase Earth's arable land?

3 votes
2 answers
870 views

climate control and carbon sequestration via bulk air liquification

0 votes
5 answers
246 views

How can I explain this mental power scientifically? [closed]

9 votes
1 answer
711 views

How do you tell if you're in a nebula?


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