Random Educational Fact: Dolphins sleep with one eye open. Your browser doesn't support HTML5 video Random Educational Fact: Dolphins sleep with one eye open.View the AMP version of this page.Explore: NPsoNExplore: zTfCU7tws.donghecokhihd68.comExplore: ydFTPExplore: J90ZHExplore: dAnFTj8f0qs.2travel2live.comExplore: w2gUT