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DNA that left inside and dry at room temperature can last for years, such as that found on hairs in a hair brush. DNA in harsh conditions such as high heat or strong chemicals, can degrade very quickly (minutes to years). DNA that is preserved well can last a very long time - an ancient human from over 4000 years ago was recently discovered with DNA of sufficient quality that it could be sequenced. DNA can stick around forever, as long as it is in the right conditions.

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13y ago
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Q: What is the average life span of DNA - RNA?
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