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celtschk
  • Member for 9 years, 9 months
  • Last seen more than 1 year ago
14 votes
4 answers
3k views

Bringing potatoes to the middle ages

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?

1 vote
2 answers
294 views

Would self-flying cars fly?

21 votes
6 answers
2k views

How to safely wish?

6 votes
11 answers
761 views

In a world without science, what would cause society to widely lose belief in the fundamentals of its religion?

155 votes
34 answers
20k views

The AI that fails to be evil

17 votes
3 answers
1k views

Sharks with frickin' lasers!

19 votes
7 answers
19k views

What would an ammonia-based world look like?

26 votes
4 answers
7k views

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

9 votes
9 answers
4k views

How would a disabled person earn their living in a medieval-type town?

4 votes
8 answers
7k views

What would a relativistic kill vehicle hitting the moon look like from earth?

14 votes
6 answers
5k views

Realistic spaceships: How to design a transport spaceship?

13 votes
6 answers
5k views

Humans as pollinators

7 votes
5 answers
374 views

Animals for weightlessness

57 votes
12 answers
9k views

Hacking the universe

16 votes
6 answers
2k views

Medieval low-energy houses

88 votes
29 answers
11k views

Encrypting maps

25 votes
1 answer
5k views

How to make a flying human

16 votes
4 answers
1k views

The god of the atheists

52 votes
16 answers
8k views

On a generation ship, how to handle the dead?

28 votes
9 answers
8k views

Why would alien vehicles be tripods?

1 vote
2 answers
328 views

Making Mars more massive

4 votes
9 answers
1k views

What could have caused the end of magic? [closed]

23 votes
3 answers
2k views

What would ammonia snowflakes look like?

5 votes
5 answers
1k views

How can a clairvoyant do good and at the same time protect himself?

16 votes
6 answers
3k views

Energy source for a generation ship

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?

4 votes
1 answer
619 views

Can there be planets with extremely strong magnetic fields?

8 votes
4 answers
727 views

How to make elections magic-proof?