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Joe
  • Member for 10 years, 2 months
  • Last seen more than 5 years ago
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For what reasons would an animal species NOT cross a *horizontal* land bridge?
What would a non-horizontal land bridge even look like?
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Ideas for practical post-apocalyptic currency 100 years from now
@TitaniumTurtle, as far as I know, bullets were cheaper than arrows even in the 1700s.
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Ideas for practical post-apocalyptic currency 100 years from now
Incidentally, an arrow is likely to be more expensive than a bullet, not less.
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Could humans dig out a 20km tunnel through quartzite by hand?
That's very interesting, but it doesn't really answer the questions asked here: "could they?" or "how long would it take?".
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Could humans dig out a 20km tunnel through quartzite by hand?
The Mohs hardness scale runs from about 0 to about 10. Quartzite is around a 7.
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Hanging city on Europa, is it feasible?
@Aaron, by the way, it turns out that glass is not a liquid after all. Here's one of my favorite examples of ancient glass.
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Moon that changes color with phase
@TimB, the moon could be tilted almost 90 degrees.
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Realistic applications of alchemy?
fixed a few small typos and such
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In a world without any beasts of burden, what alternatives for transport are there?
@njuffa, camels weren't introduced to Africa until the late Roman period.
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What could limit geographically a resource such as an ore to a specific spot on a planet?
@JBH, regardless of their height, after a brief formation period, mountains wear down with age.
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