A project to build a clock that will run for 10,000 years got us thinking about how we measure time - and amazingly, 10,000 years is more time than has passed since the invention of hours, minutes and seconds. Plus: a quick look at the shortest official measurement in science, which is so short that, ironically, there isn't enough time to try to explain it on our show.
Why is a minute divided into 60 seconds, an hour into 60 minutes, yet there are only 24 hours in a day? (Scientific American)