Encore episode. Helium is the second-most common element in the cosmos, but it's far rarer on planet Earth. As part of our celebration of the periodic table's 150th birthday, correspondent Geoff Brumfiel )shares a brief history of helium's ascent, to become a crucial part of rocket ships, MRI machines, and birthday parties. Read more of Geoff's reporting on helium here).Email the show at [email protected]).Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)
