A pig’s kidney was just transplanted into a human. But Vox’s Dylan Matthews says we shouldn't need the pigs.

This episode was produced by Victoria Chamberlin and Hady Mawajdeh, edited by Amina Al-Sadi, fact-checked by Anouk Dussaud, engineered by David Herman, and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained

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