Okay so I’m sure if you’ve read in history that sometime around Jurassic age that insects were like stupidly big due to O2 saturated environments. why can’t we manufacture an enclosed space with gradually increasing oxygen saturation over a few generations and see how big we can get insects?
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Experiments have been done, with surprising results. Dragonflies do in fact grow larger if raised in a high oxygen environment, without any genetic change.
[Science Daily article ](https://www.sciencedaily.com/releases/2010/10/101029132924.htm)
[Wired article](https://www.wired.com/2010/11/huge-dragonflies-oxygen/)
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