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The original was posted on /r/explainlikeimfive by /u/Fruitsdog on 2023-10-05 04:10:10.

Hearts pump blood. We have machines that can do that. Why are we trying to genetically modify pig hearts to be useable in humans when we can just build hearts for them? Surely if it was because we’d need to charge them, we could figure it out. We’re a clever species.