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Search options not deleted user 9612

For questions about a different and uncharacteristic species or object that has come to the world from another world. NOT for questions about extraterrestrials in their native environment.

5 votes
2 answers
268 views

Iron averse aliens

Imagine a planet similar in chemical composition to Earth. Could life evolve there for which iron in its elemental form (not necessarily oxides) was toxic? Could animal type lifeforms exist that had s …
Dave Halsall's user avatar