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4 votes
6 answers
198 views

What constraint would make a teleporter only able to teleport with willing participants?

4 votes
1 answer
84 views

Could medieval Native Americans domesticate the bison?

4 votes
0 answers
172 views
+100

What would this animal's stool be like?

2 votes
2 answers
91 views

Would water-based rain float on top of large sea of liquid mercury?

3 votes
1 answer
79 views

What would the launch and explosion of FTL-missiles look like?

3 votes
10 answers
3k views

I designed a Maglev space propulsion tube on Mt. Everest. Do you see any issues with it?

3 votes
1 answer
85 views

What are the advantages and disadvantages an underwater civilization has over a terrestial one?

3 votes
1 answer
48 views

What is mathematical formula for finding the mean surface temperature on a planet in our solar system?

25 votes
22 answers
5k views

Ideas for a human convenient, long term date system spanning many trillions of years

0 votes
0 answers
14 views

Explaining My Planet’s Weather

3 votes
4 answers
373 views

What kind of alien homworld would result in the following kind of alien (i.e. my Enslavers) naturally evolving?

15 votes
11 answers
4k views

How would a blind intelligent species navigate space?

5 votes
1 answer
95 views

Space elevator counterweight station keeping

7 votes
3 answers
194 views

Does a digitigrade biped need a tail?

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