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Top Questions

22 votes
12 answers
5k views

How soon after first contact could an advanced civilization make large financial transactions on Earth?

10 votes
11 answers
3k views

Numeral systems based on different colors rather than different symbols?

15 votes
12 answers
2k views

How to map arms of the galaxy?

11 votes
16 answers
3k views

Modern era with magic that will stop gunpowder from igniting, what weapons are used instead?

13 votes
9 answers
3k views

What problems would a truly gigantic fantasy city encounter?

10 votes
12 answers
2k views

Would improvised motor vehicles be feasible a century after the fall of industrial civilization?

6 votes
11 answers
2k views

Would a laser resistant (heavily heat resistant?) armour for space ships have unfortunate consequences and would it still have to deal with heat?

6 votes
3 answers
3k views

How feasible would it be if cockroaches no bigger than an inch (2.5 centimetres) took fall damage from around 6-7 feet in the air or less?

4 votes
8 answers
2k views

What is the most important objective for survival in a post-apocalyptic society?

3 votes
4 answers
639 views

What is the Distance needed for gravitational lensing for offensive lasers?

12 votes
1 answer
2k views

How old must The Moon be?

3 votes
3 answers
1k views

How would an observer from a moon the mass of Earth orbiting a planet 81.3 time more massive be able to tell that they were orbiting with 1660's tech

3 votes
2 answers
321 views

What changes would be expected of Earth plants on a low-light planet?

7 votes
3 answers
490 views

Interception of missiles in space combat

1 vote
6 answers
180 views

Could a substance (drug, chemical, etc.) instantly teach a language?

4 votes
3 answers
414 views

What thickness of human flesh would have the same protective value as 100mm of RHA?

0 votes
2 answers
439 views

How much and how powerful would a "phlebotinium" bomb launched from orbit be to create an artificial sea? [closed]

5 votes
3 answers
228 views

What engineering complications would come from a species being giant?

4 votes
5 answers
248 views

How would my fantasy race keep blood in ceremonial pots without it getting gross?

3 votes
3 answers
204 views

How efficient would meat plants be?

2 votes
1 answer
59 views

How do I get the outer planets to meet in the night sky every 1-2 yrs on my planet?

6 votes
1 answer
91 views

Software for diagramming food webs?

1 vote
3 answers
54 views

Is it possible to create a to create a homemade weapon using electromagnetic or microwave energy, sound or sonic beams? [closed]

4 votes
1 answer
79 views

How would about a dozen 50 ft to 1,400 ft (approx. 15 m to 430 m) giants wandering around a continent affect seismic activity?

0 votes
1 answer
59 views

How many customers per day would a medieval-era tavern serve on average in a big city? [closed]

1 vote
1 answer
110 views

How would a "universal language field" work? [duplicate]

-2 votes
2 answers
78 views

How high would the bodycount of a 6 foot tall mutant killer cockroach be in modern times before it is taken out by military/police/armed citizen(s)? [closed]

1 vote
1 answer
75 views

How can I make my insect life cycle time system more accurate

-2 votes
0 answers
74 views

Magic apocalypse in a fantasy world: which branches of knowledge should be preserved? [closed]

-2 votes
0 answers
72 views

About quantum quark computer [closed]

0 votes
0 answers
44 views

What's stopping other rock layers from creating a karst-like landscape?

2 votes
0 answers
42 views

Geological activity and of superearth - cannonball moon system

0 votes
1 answer
32 views

How to provide electricity to a refugee center when the sky is black [closed]

0 votes
0 answers
20 views

Problems/Considerations with a Low Density Super Earth Satellite [closed]

-1 votes
0 answers
18 views

What would the consequences of a giant kaiju sleeping under a fantasy city [closed]


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