Extraterrestrial Biology Answers · Maars

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Could alien life be based on something other than DNA?
Explore how alien life could use RNA, XNA, or other chemistry instead of DNA, and why any life still needs heredity and evolution.
Could alien life be based on something other than DNA?
Explore how alien life could use RNA, XNA, or other chemistry instead of DNA, and why any life still needs heredity and evolution.
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Best Answer91% confidence91%May 29, 2026

Best Answer91% confidenceMay 29, 2026

Extraterrestrial Biology Answers · Maars

Explore extraterrestrial biology with community Q&A on alien life, alternative biochemistry, and how scientists think about life beyond Earth.