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celtschk
  • Member for 9 years, 8 months
  • Last seen more than 1 year ago
155 votes
34 answers
20k views

The AI that fails to be evil

131 votes
21 answers
17k views

How does Santa protect himself from IP lawsuits?

130 votes
20 answers
43k views

Could a planet made completely of water exist?

88 votes
29 answers
11k views

Encrypting maps

57 votes
12 answers
9k views

Hacking the universe

52 votes
16 answers
8k views

On a generation ship, how to handle the dead?

45 votes
16 answers
11k views

A pill to make you think faster: Side effects?

43 votes
12 answers
16k views

A person from medieval times comes into our time. What would he notice first?

35 votes
4 answers
3k views

How large could a planetary diamond be?

28 votes
9 answers
8k views

Why would alien vehicles be tripods?

26 votes
4 answers
6k views

What minimal radius is needed for rotation to simulate gravitation without adverse effects on humans?

25 votes
7 answers
1k views

Power plants — literally

25 votes
1 answer
5k views

How to make a flying human

23 votes
3 answers
2k views

What would ammonia snowflakes look like?

21 votes
12 answers
9k views

If a space ship crashes on a planet, is it realistic that things from that space ship could be rescued afterwards?

21 votes
6 answers
2k views

How to safely wish?

19 votes
4 answers
2k views

How far would I have to be from a nuclear detonation in space in order to survive it?

19 votes
7 answers
19k views

What would an ammonia-based world look like?

17 votes
3 answers
1k views

Sharks with frickin' lasers!

16 votes
3 answers
3k views

How long until a small black hole makes the sun fail?

16 votes
6 answers
3k views

Energy source for a generation ship

16 votes
6 answers
2k views

Space, the final frontier … to defend

16 votes
6 answers
1k views

How many people would be needed to operate a space hotel?

16 votes
6 answers
2k views

Medieval low-energy houses

16 votes
4 answers
1k views

The god of the atheists

15 votes
7 answers
718 views

How to fight the orwellian machines?

15 votes
1 answer
2k views

Radiation shielding for a space ship

14 votes
6 answers
5k views

Realistic spaceships: How to design a transport spaceship?

14 votes
4 answers
3k views

Bringing potatoes to the middle ages

13 votes
6 answers
5k views

Humans as pollinators