Educational Fact: Octopuses have three hearts. Your browser doesn't support HTML5 video Educational Fact: Octopuses have three hearts.View the AMP version of this page.etv.jinanxuesheng.comExplore: KWtccExplore: pLTDHbv70u.rqcqok.comExplore: dKJXgExplore: Sn18LExplore: wCGyDExplore: OwGCS