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Honestly I don’t think anything could extinguish all life on earth short of maybe 20 comets hitting earth at the same time or something.
by huytersd 3y ago
Honestly I don’t think anything could extinguish all life on earth short of maybe 20 comets hitting earth at the same time or something.
- samplatt 3y agoI wonder how long it'd take for life to leave after Earth leaves the goldilocks zone. How much life would there be after the oceans have evaporated and stripped into space? If life could evolve to not require water at all, maybe it could survive until the sun physically envelops the planet.
- antonvs 3y ago20 comets (or asteroids) wouldn’t even come close to doing it. Events like that can cause extinctions of many ecosystems, by many others will be essentially unaffected. Microbes in the sediment below the seafloor are a good example. They wouldn’t even notice the comets.
- pfdietz 3y agoThe slow and inexorable brightening of the Sun (it's already 30% brighter than when it settled onto the Main Sequence) will eventually cause a runaway greenhouse effect. The oceans will all be converted to steam and the surface temperature will be far beyond what life could survive. After that things only get hotter until the Sun enters its end stages and leaves the Main Sequence.
- BurningFrog 3y agoA hot surface does very little to life several miles below it.
- pfdietz 3y agoSince heat is flowing out of the Earth, the temperature below will eventually become hotter than the temperature at the surface.
- non-chalad 3y ago[flagged]