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This is the correct answer. These lava tubes are, at their youngest, a couple billion years old. Since then, the moon has been thwacked very hard and -- on thos
by nkoren 9y ago
This is the correct answer. These lava tubes are, at their youngest, a couple billion years old. Since then, the moon has been thwacked very hard and -- on those timescales -- often. If the tubes haven't collapsed yet, then there's a high likelihood that they're exceptionally stable.
- DougWebb 9y agoThat could be survivor bias. Maybe there used to be a lot more of them.
- robryk 9y agoWouldn't a collapsed tube be very distinctive visually?
- nkoren 9y agoVery much so -- and one has even been explored by humans! https://en.wikipedia.org/wiki/Hadley%E2%80%93Apennine https://en.wikipedia.org/wiki/Hadley%E2%80%93Apennine
- njarboe 9y agoYes survivor bias. But since these survived, they are likely to be structurally sound. Like antique furniture or structures on Earth.
- larkeith 9y agoDoes that count as natural selection?
- pstuart 9y agoI don't think lava tubes breed.
- hyperbovine 9y agoSurvival of the fittest, then.