Don't get me wrong, I think we should do a lot more testing before using CRISPR in humans.
But scientists in the lab are having a lot of fun. They're using it to:
Study the brains of creatures without skulls by making their neurons light up
Study hive insects, specifically raider ants
Knocking out genes tells us how genes affect behavior in animals, especially simpler ones, and teaches us more about how evolution works.
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