Our ability to measure time is one of the fundamental things which makes us human. We’ve gone from very crude and inexact measures of time to time measurements which are so accurate that it would take billions of years to lose a single second. This increased accuracy has allowed us to navigate the seas, space, and even get directions to a nearby store. Learn about the history of how we keep time on this episode of Everything Everywhere Daily. Learn more about your ad choices. Visit megaphone.fm/adchoices