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For questions regarding planets similar to Earth in most respects. This tag should be used when describing a planet that follows the rules of Earth with exceptions outlined in the question. Usually questions using this tag will be about the differences and the impacts of those differences.
5
votes
Earth-like planet with a very hot ocean?
The average temperature of Earth ocean's surface water is 17°C. The average temperature of Earth ground-level atmosphere is 14.6°C. These numbers are tightly correlated. This is why coastal areas usua …
9
votes
Terraforming a low oxygen Earth-like planet
Photosynthetic algae
One of the first great extinction events of our world was the mass oxidation of the atmosphere by cyanobacteria (among other organisms). From the Wikipedia article: "For example, …