We (mostly) got rid of acid rain, but now there’s another scary thing falling from the sky.This episode was produced by Avishay Artsy, edited by Jolie Myers, fact-checked by Miles Bryan, engineered by Patrick Boyd and Andrea Kristinsdottir, and hosted by Sean Rameswaram.Further reading: We got rid of acid rain. Now something scarier is falling from the sky. Transcript at vox.com/today-explained-podcastSupport Today, Explained by becoming a Vox Member today: http://www.vox.com/membersPhoto by Christopher Furlong/Getty Images.Learn more about your ad choices. Visit podcastchoices.com/adchoices