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: RoejqExplore: fi6kwExplore: zdCz8Explore: YpdrXExplore: 2vWgVExplore: KvleIExplore: U6HdDExplore: 4N7bD