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A comment on Possible dinosaur DNA has been found. Parent comment

Re:Possible dinosaur DNA has been found by phiresky on Friday April 17, 2020 @03:19PM (#22902066)
> DNA has a half life of ~500 years

but:

Researchers in 2016 measured chloroplast DNA in marine sediment cores, and found diatom DNA dating back to 1.4 million years.[62] This DNA had a half-life significantly longer than previous research, of up to 15,000 years. Kirkpatrick's team also found that DNA only decayed along a half-life rate until about 100 thousand years, at which point it followed a slower, power-law decay rate.

https://en.wikipedia.org/wiki/Ancient_DNA#Non-human_aDNA

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Re:Possible dinosaur DNA has been found by hyperbovine on Friday April 17, 2020 @03:54PM (#22902384)
> and found diatom DNA dating back to 1.4 million years.

Okay, so you're 1/45th of the way there.

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