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Top Questions

19 votes
20 answers
6k views

How to prevent theft in a society where everyone has hyperspace storage?

14 votes
7 answers
5k views

Can we hit the spaceship

7 votes
15 answers
6k views

How could a Renaissance level feudal society get into space?

12 votes
7 answers
4k views

Can a spaceship "hitchhike" on an explosion to escape a gravity well?

13 votes
6 answers
3k views

Possibility of anachronistic fossils due to time travel

14 votes
8 answers
2k views

Realistic protection for spaceships against kinetic projectiles

8 votes
6 answers
3k views

Super-powered being flying over national airspace

8 votes
6 answers
2k views

The science behind an invisible wall of pain

5 votes
8 answers
667 views

Why are scout bots only used for reconnaissance?

0 votes
6 answers
3k views

How much steel could be recovered from cities a few hundred years after a nuclear apocalypse? [duplicate]

9 votes
6 answers
1k views

What range of altitudes would not be fatal for an astronaut falling from height on the moon?

2 votes
5 answers
1k views

Bullet resistant space armor material

6 votes
5 answers
913 views

Did I just discover that the ether that my etheric keels interact with is four-dimensional?

2 votes
1 answer
780 views

How to survive a helicopter crash using alien biotechnology?

2 votes
2 answers
149 views

Could a torpedo fits through a smaller opening due to length contraction?

6 votes
2 answers
271 views

Is it possible for a plant to form a biological "greenhouse" to protect its delicate flowers using some sort of clear, insular material?

0 votes
3 answers
157 views

How to provide a concrete evidence that the time machine works? [closed]

1 vote
1 answer
238 views

Can a terrestial planet have a core of metallic hydrogen?

3 votes
3 answers
318 views

How could I redesign my dragons to have 6 limbs and still be able to fly?

3 votes
3 answers
167 views

In a world with a species of Parasitic Flower, What afflictions could it cause to a living organism?

3 votes
3 answers
78 views

How could a spacecraft defend against a train of small hypervelocity impactors?

3 votes
3 answers
117 views

So, I was thinking a biological kinda ozone layer?

2 votes
2 answers
137 views

Rate at which jackhammer excavates asteroid

3 votes
1 answer
123 views

How to prevent demon slayers from murdering their own en masse?

4 votes
1 answer
120 views

Can two species from the same genus but with a different sex determination system interbreed and have fertile (or at least sub-fertile) offspring?

2 votes
2 answers
114 views

Could laser collisions be used as an interstellar dust deflector?

-1 votes
3 answers
106 views

How would a government lay claim over a Space Colony that it never founded? What legal arguments could they make to cite it’s always been theirs? [closed]

1 vote
2 answers
58 views

If the entire ocean on Earth were poured into Mars instantly, how long would it last?

0 votes
1 answer
119 views

What time units would a civilisation constantly travelling between planets and universes use? [duplicate]

0 votes
2 answers
144 views

How do you justify Adventurers being multiple [Character Classes] instead of everyone being Generalists in fantasy settings? [closed]

-3 votes
1 answer
142 views

How would a supernatural boiling sea in the Southern Ocean affect Earth's climate? [closed]

1 vote
3 answers
133 views

Which firearms should a group of people time-travelling with the intent to conquer carry if it's a one way trip on a ship [closed]

2 votes
1 answer
100 views

How could the Electrokinesis of this race I’ve created be enhanced by Pyrokinesis?

2 votes
1 answer
140 views

Question about speculative human biology

6 votes
0 answers
70 views

Temperature of an Earthlike planet in Mars location?

-3 votes
0 answers
78 views

How can I describe a plausible spacetraveling alien civilization that looks as unlike as humans as possible while maintaining hard sci-fi norms [closed]

0 votes
0 answers
75 views

How to find the region where gas giants can exist?

-2 votes
0 answers
74 views

Does anyone know whether or not there is a specific name for a scarf which only veils the lower portion of a character's face? [closed]

0 votes
0 answers
54 views

How would you justify technological advancement both digital and cybernetic without the risks of orwellian controls? [closed]

-2 votes
1 answer
54 views

How to market cloaking devices at different tiers? [closed]

0 votes
0 answers
34 views

What would a society that hasn't reached space yet think of their planet's rings? [closed]

-1 votes
0 answers
27 views

Movement of magma and the build up of the magnetic fields around the earth. I am not a scientist [closed]


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