2,500 years ago, the Greek philosopher Zeno posed a question. If you want wanted to travel from one place to another, you first have to go half the distance, then you have to go half the distance again, and then again. You can do this infinitely and never reach your goal. This was one of the first paradoxes known to history. Since then, there have been many many others, which often leave people scratching their heads. Learn more about your ad choices. Visit megaphone.fm/adchoices