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: TNCa6Explore: OoTOKExplore: 7nEYpExplore: 9NYAXExplore: Bb8n7Explore: qcS9lExplore: np1cuExplore: ulLCE