Which organ never stops pumping and can even be trained? Melly and Omar explore the wonder of the heart. Aresu and Valentin test their strength against their own hearts, while Melly and Christopher take on a roller coaster and haunted ...See moreWhich organ never stops pumping and can even be trained? Melly and Omar explore the wonder of the heart. Aresu and Valentin test their strength against their own hearts, while Melly and Christopher take on a roller coaster and haunted house ride to see how their heart rates change. The quiz team also asks: why does our face turn red when we stand on our head-but not our feet?
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