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6 votes
4 answers
2k views

Could a world tree have different biomes?

1 vote
3 answers
231 views

In a world where the grid started with inverters instead of alternators, would we still use sine wave ac?

6 votes
4 answers
392 views

How many alien worlds could exist within 100 ly without us noticing?

7 votes
7 answers
2k views

Bone as a structural material; or, making a building's skeleton literal

4 votes
3 answers
578 views

Would it be plausible to have a flat eye with a moving pupil?

2 votes
3 answers
197 views

What would be the length of a year in a binary star system?

11 votes
2 answers
1k views

Photosynthesis with Microwave or Radio Wave

7 votes
5 answers
2k views

Would keeping all coils on be a good way to surpass the coilgun timing problem?

7 votes
5 answers
2k views

Could sapient life evolve in 2 billion years?

0 votes
5 answers
3k views

How possible is it for someone to be born without a sex(physically)?

0 votes
1 answer
142 views

If there was a small moon orbiting closely to a planet with water, how much would it affect the tides?

2 votes
2 answers
187 views

Creating a habitable satellite with reasonable length days

9 votes
16 answers
3k views

Could a society develop modern computers (circa 2020s) without having invented or needing the internet?

10 votes
2 answers
3k views

How to create a rainforest and desert in proximity to each other such that the desert can be hottest or coldest possible on an Earth-like planet

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