Where did the high five come from? Who came up with it? And why has it persisted for so long? Plus, what if we could turn the entire Earth into a telescope? One astronomer has drawn up the plans. And, how bad is blue light for you, really?Sponsor:Mint Mobile, Get a new wireless plan for just $15 a month mintmobile.com/kottkeLinks:From the archives: The wild, mysterious history of sports' most enduring gesture -- the high five (ESPN)The Gay History of the High Five (The Advocate)Who invented the high five? (Getting Better, Together)An astronomer has come up with a way to use the entire Earth as a telescope: The Terrascope (Syfy)What Happens to Your Eyes When You Stare at Screens All Day (LifeHacker)Prince’s ‘Welcome 2 America,’ an Unreleased Album, Is Due Out in July (NY Times)Kottke.OrgJackson Bird on TwitterSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.