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meaninglessname
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23 votes
13 answers
7k views

How could a self contained organic body propel itself in space

20 votes
14 answers
9k views

Are mechanical walking vehicles useful in combat? [duplicate]

9 votes
4 answers
263 views

what could be used for flexible piping in the 1780s

9 votes
2 answers
331 views

Could an electroreceptor organ work above water?

5 votes
3 answers
176 views

how could I move an earth sized planet? [duplicate]

4 votes
3 answers
255 views

Would a Dyson sphere be useful as a means of power generation?

4 votes
3 answers
212 views

What methods of oxygen respiration work roughly equally well in both water and air?

3 votes
2 answers
274 views

Do bigger rocket work better?

2 votes
1 answer
126 views

what is the maximum theoretical density for qubits?

2 votes
3 answers
163 views

Could power be generated using the temperature difference in venus's atmosphere?

2 votes
3 answers
152 views

What materials and what shapes should be used for struts inside a vacuum airship's envelope?

2 votes
2 answers
104 views

highly resistant metal or other material in late 1700s

1 vote
2 answers
211 views

Could we move a gas giant by venting its gas?

1 vote
1 answer
211 views

What is the largest a mountain could be? [closed]

-2 votes
1 answer
107 views

What is the largest a wheeled or tracked vehicle could get? [closed]

-4 votes
4 answers
243 views

what are some ways to store information mechanically?