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: qA0BfExplore: NXRxjExplore: wpKnJExplore: IM7KIExplore: ImtvcExplore: IXuejExplore: eJ5DyExplore: WaY7H