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Activity for martinkunev‭

Type On... Excerpt Status Date
Question Effects of asteroid passing very close to the planet
I am trying to think of a natural event that causes very big impact to human lives - massive movements of people, shift of power, etc. This event happens in a medieval period on an earth-like planet. I was thinking that a large asteroid passing very close to earth can cause significant perturbations...
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over 6 years ago
Question Conditions for a city on a mountain
Cities usually emerge at places where transportation is easy (on a plain, near a sea or a river, etc.) so that people can come and go (facilitating trade) and water and food can be brought to the city. Under what conditions can a big city emerge on a mountain (for example in a valley)? How large can...
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over 8 years ago
Question base-12 numeral system
What could drive a human civilization to use base-12 system? As far as I know there have been such civilizations and they probably used their phalanges to count (instead of their fingers). I have found several possible reasons: the need to divide by 3 (probably the reason romans used base-12 fracti...
(more)
almost 10 years ago