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Len
  • Member for 4 years, 4 months
  • Last seen more than a month ago
19 answers
125 votes
40k views
43 bookmarks
Could a planet made completely of water exist?
1 answer
99 votes
20k views
115 bookmarks
A list of worldbuilding resources
13 answers
87 votes
11k views
9 bookmarks
0g pool: can I keep a big ball of water in space?
19 answers
78 votes
16k views
25 bookmarks
How would an aquatic race develop computers?
11 answers
56 votes
12k views
10 bookmarks
How would people conceivably escape a planet too large for chemical rockets?
9 answers
50 votes
11k views
9 bookmarks
Could you have more than one building in the same spot by "stacking" them in 4th dimensional space?
20 answers
37 votes
8k views
7 bookmarks
How would people tell time if it was always day?
27 answers
37 votes
10k views
7 bookmarks
How can paleolithic humans colonise the stars without direct help from aliens and still be primitive?
16 answers
36 votes
13k views
16 bookmarks
Can telepathy and telekinesis exist in biological creatures?
16 answers
34 votes
13k views
14 bookmarks
Can airborne floating/flying islands be scientifically possible?
7 answers
34 votes
23k views
10 bookmarks
Anatomically correct multiarmed humanoids
6 answers
34 votes
3k views
10 bookmarks
How would a city styled like Venice be built with lava instead of water?
12 answers
30 votes
6k views
10 bookmarks
How to wrap the Moon in plastic to make her a giant, supported by the atmospheric pressure, greenhouse
12 answers
30 votes
9k views
8 bookmarks
What would be a credible way to design a watertight membrane that still allows large organisms to pass through?
8 answers
29 votes
7k views
13 bookmarks
How to Breathe Both on Land and Under the SEA
16 answers
29 votes
4k views
12 bookmarks
Can the existence of an orthogonal reality be proven to those who cannot experience it?
11 answers
28 votes
5k views
9 bookmarks
What's the impact of a "cloning" teleporter?
8 answers
27 votes
5k views
5 bookmarks
How should fledgling planet colonies deal with supply crews suffering from barophobia (fear of gravity)?
4 answers
25 votes
5k views
8 bookmarks
Can a gas giant have its own habitable zone?
11 answers
25 votes
9k views
6 bookmarks
How would a lunar colony defend itself against aggression from Earth?
8 answers
21 votes
4k views
3 bookmarks
Surface is 500F (260 C), but we have thorium reactors, diggers and heat pumps so human life continues underground. Possible? Or slow-roast?
3 answers
21 votes
3k views
13 bookmarks
Making a planet habitable for humanoids: The planet
7 answers
21 votes
5k views
2 bookmarks
What would it take for an island to sink and rise yearly and naturally
8 answers
21 votes
5k views
12 bookmarks
How would an aquatic civilisation forge tools?
3 answers
21 votes
1k views
8 bookmarks
Life on a planet with multiple gas layers
5 answers
21 votes
5k views
4 bookmarks
How dense of an atmosphere do I need to "float" an ocean of liquid at 1000 ft elevation?
7 answers
21 votes
4k views
4 bookmarks
Hollow planet with another planet inside it
10 answers
20 votes
4k views
3 bookmarks
Are there alternatives to mining asteroids/planets for obtaining matter?
3 answers
19 votes
3k views
4 bookmarks
Eating Titan's oceans
15 answers
19 votes
3k views
5 bookmarks
Using physics - How can a character fly
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