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How fast do binary stars orbit each other?

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JNC4
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8 answers
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Could superhuman pre-Industrial Orcs wage effective guerilla warfare against a modern military?

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Dast
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13 answers
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Is there a good geometric analogy for a 'trap' dimension that you can stumble into easily but is very hard to exit?

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toolforger
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Can a planet fifteen times heavier than Jupiter not turn into a brown dwarf if it rotates fast enough and at the same time has a solid surface?

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Frank Thompson 4
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47 votes
17 answers
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Biological CPUs - why would the developed world fear them?

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Alexander The 1st
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1 answer
33 views

Do sulfuric acid plants produce oxygen?

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Willk
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4 votes
2 answers
101 views

Does a digitigrade biped need a tail?

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ProjectApex
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2 votes
1 answer
35 views

Biological mineral storage in an acidic world?

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rubpy32
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5 votes
8 answers
996 views

In a world without grasses, which vegetarian foods would be best suited for long-term storage?

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immosha
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11 votes
4 answers
590 views

Would a purely agricultural world exporting its production be sustainable when it comes to water?

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JBH
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2 votes
1 answer
42 views

How would (mostly the the head of) a hunting oriented mountain hominid look like?

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Willk
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4 votes
1 answer
69 views

Would Chlorosian photosynthesizers produce chlorine or oxygen?

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Logan R. Kearsley
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1 vote
1 answer
62 views

Does my concept for an "ergosphere highway" make scientific sense?

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JBH
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2 votes
1 answer
107 views

Would a longer PETM make Earth hotter than it was?

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Nierninwa
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