Skip to main content

Top Questions

27 votes
21 answers
7k views

Why does my futuristic society want transparent iPads and computer monitors?

24 votes
10 answers
4k views

Why machine worlds?

18 votes
16 answers
4k views

How can I design a benevolent, all-powerful deity, and still have a society with day-to-day issues?

15 votes
12 answers
5k views

What animals would herbivorous humans most likely domesticate?

13 votes
12 answers
4k views

Minimizing bleeding, maximizing killing

14 votes
11 answers
3k views

Subtle clues that an AI is smarter than it appears [closed]

14 votes
13 answers
3k views

Why would dragons evolve to breathe fire?

8 votes
15 answers
3k views

How to build a defensive wall that Stone Mages can't easily deconstruct?

11 votes
10 answers
4k views

Is this super soldier viable and grounded?

12 votes
14 answers
4k views

Why does a goddess put a low limit on the number of priests?

17 votes
9 answers
4k views

Is it possible to have very different sea levels?

18 votes
10 answers
2k views

How would the existence of sapient "Pet Rocks" affect the economy of a medieval kingdom?

9 votes
9 answers
5k views

Will nothing bad happen if I just create infinite energy?

12 votes
14 answers
2k views

What kind of alien technology would make space colonization viable?

10 votes
10 answers
4k views

How practical would it be to use a handgun-knife hybrid weapon?

15 votes
5 answers
5k views

How long would it take for nature to reclaim a completely abandoned city?

8 votes
12 answers
2k views

Why aren’t there advanced computers in an advanced society?

14 votes
9 answers
4k views

Will it be possible to prevent cancer by introducing ECC on genome?

15 votes
5 answers
6k views

Life on a planet with never-ending rain

11 votes
7 answers
3k views

Would medieval humans know if an ancient civilization had existed and been wiped out?

6 votes
11 answers
974 views

In a sci-fi setting with advanced medicine, how can people still have scars and other damages?

10 votes
7 answers
3k views

How would I pull off FTL travel in a universe where inter-universal travel is also widely used?

12 votes
2 answers
3k views

Which colors were rare for leather to be dyed?

10 votes
16 answers
3k views

What type of geopolitical status quo can lead to perpetual warfare becoming the norm?

6 votes
6 answers
4k views

No stomach, how do I eat?

7 votes
7 answers
2k views

What are advantages of plasma based weaponry in ship-to-ship combat

16 votes
3 answers
5k views

What is the largest fraction of Earth's sky that an astronomical object could take up (visually) before ripping Earth or itself apart?

5 votes
6 answers
3k views

How could Venus be partially terraformed?

6 votes
6 answers
2k views

Is it possible for a humanoid to learn English within a few days, just from observing conversations?

7 votes
6 answers
2k views

Stealth on Titan (ground vehicles against satellites)

4 votes
10 answers
3k views

Could the theory of evolution become common knowledge in a society with medieval technology?

10 votes
4 answers
2k views

Would caves maintain a cool temperature on the hot side of a tidally locked planet?

15 votes
2 answers
2k views

Are my skin and hair colors believable?

6 votes
3 answers
2k views

Can I have a planet with 150 kph winds across the entire surface?

5 votes
6 answers
478 views

What are some alternatives to horses in a medieval world? [duplicate]

12 votes
2 answers
2k views

Using a planetary flyby to reduce speed

13 votes
3 answers
2k views

What types of tropical plants could evolve to tolerate a humid climate around 40 - 45C?

2 votes
6 answers
2k views

How can you change up medieval feudalism while keeping the concept of 'houses'?

7 votes
6 answers
2k views

Why aren't there kamikaze warp bombs?

7 votes
5 answers
2k views

How bright would it be at night on my planet?

8 votes
6 answers
372 views

Effectiveness and impact of hypersonic needles replacing supersonic bullets

9 votes
4 answers
2k views

Are humanoid cetaceans evolutionarily possible?

9 votes
6 answers
1k views

How to use a character's creativity and understanding to expand and improve a consistency-based foresight power

11 votes
4 answers
1k views

Would zombies be all bald? [closed]

7 votes
3 answers
1k views

Could variation of the universal constants affect computation?

4 votes
6 answers
491 views

Is there a reason why computers of the 1920s-1980s look the way they do? [closed]

0 votes
7 answers
1k views

Is it possible to make a planet full of water and at the same time without life?

18 votes
2 answers
914 views

What would mice use as raw materials for clothing?


Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.