If you get there last, leave a message

There’s a scene in Three Little Pigskins where Moe and Larry are arranging to meet at a predetermined location:Moe: If you get there first, put a chalk mark.Larry: Okay. What if you get there first?Moe: Then I’ll rub it out.1Anyway, The Reg reports that scientists have done this, only better, sending a message from one photon to another […]