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Search options not deleted user 81070

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

Area denial organism for pre-industrial human beings on Earth

Incompatible essential amino acids As far as we can tell, there was only one (successful) origin of life on Earth, and every living thing is related. That means that most of our biochemistry is compa …
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