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Tangentially relevant is the way CRISPR works, and I would recommend the Nobel acceptance speeches by Jennifer Doudna and Charpentier.

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I found a speech by Jennifer Doudna here: https://www.youtube.com/watch?v=KSrSIErIxMQ

Listening now, thanks!

Glad you found it. A very simple explanation I heard a while back (NPR?) was that the system is able to keep "mugshots" of intruders it has seen and then snip their DNA when there's a match with the mugshot.

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