• Question: can humans survive with two hearts in them?

    Asked by anon-174152 to Alex, Carl, Melanie, Tim, Yewande on 20 Jun 2018.
    • Photo: Alex Seeney

      Alex Seeney answered on 20 Jun 2018:

      Probably, but such a thing would have to evolve for a particular reason – at the moment, we need a heart with four chambers to keep two types of blood (oxygenated and deoxygenated) pumping around the body. If the need ever arose for us to have four types of blood in two separate hearts, then that’s when you might see two hearts.

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