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.Explore: XI3s9Explore: DFqrJExplore: V0fssExplore: aubg4Explore: U4XQJExplore: YHfIOExplore: iVsAFExplore: cpZhU