The surface of the Earth is constantly recycled through the motion of plate tectonics. So how do researchers study what it used to look like? Planetary scientist <a href="https://paleomag.fas.harvard.edu/people/roger-fu">Roger Fu</a> talks to host Maddie Sofia about hunting for rocks that paint a picture of the Earth a few billion years ago, in the early days of the evolution of life. Follow host Maddie Sofia on Twitter <a href="https://twitter.com/maddie_sofia">@maddie_sofia</a>. Email the show at <a href="mailto:shortwave@npr.org">shortwave@npr.org</a>. Learn more about sponsor message choices: <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a> <a href="https://www.npr.org/about-npr/179878450/privacy-policy">NPR Privacy Policy</a>

The Pandemic Time Warp

New discoveries, everyday mysteries, and the science behind the headlines — in just under 15 minutes. It's science for everyone, using a lot of creativity and a little humor. Join hosts Emily Kwong and Regina Barber for science on a different wavelength.If you're hooked, try Short Wave Plus. Your subscription supports the show and unlocks a sponsor-free feed. Learn more at plus.npr.org/shortwave