Podcast:Who Smarted? - Educational Podcast for Kids Published On: Mon Feb 15 2021 Description: How did they tell time before clocks? How did they come up with hours, minutes and seconds? What do AM and PM mean? For free home activities sign-up at www.WhoSmarted.com See omnystudio.com/listener for privacy information. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.