Helium is full of contradictions. It’s the second most abundant element in the universe, but is relatively rare on Earth. It’s non-reactive, totally inert—yet the most valuable helium isotope is sourced from thermonuclear warheads. And even though we treat it as a disposable gas, often for making funny voices and single-use party balloons, our global supply of helium will eventually run out. That’s because, at a rate of about 50 grams per second, this non-renewable resource is escaping the atmosphere for good. In this edition of The Element of Surprise, our occasional series about the hidden histories behind the periodic table’s most unassuming atoms, we examine the incredible properties and baffling economics of our most notable noble gas. Featuring Anjali Tripathi and William Halperin. This episode was produced by Taylor Quimby and first released in 2024. For a full list of credits and a transcript, go to <a href="">outsideinradio.org</a>. SUPPORTOutside/In is made possible with listener support. <a href="https://secure3.convio.net/nhpr/site/Donation2;jsessionid=00000000.app318b?df_id=3652&mfc_pref=T&3652.donation=form1&s_src=CYE2020&s_subsrc=website&utm_source=Website&utm_medium=Donate%20button&utm_campaign=O/I%20CYE%202020">Click here to become a sustaining member of Outside/In. </a><a href="https://mailchi.mp/nhpr.org/outsideinbox">Subscribe to our newsletter</a> to get occasional emails about new show swag, call-outs for listener submissions, and other announcements. Follow Outside/In on <a href="https://www.instagram.com/outsideinradio/">Instagram</a> or join our private <a href="https://www.facebook.com/groups/304367553631852">discussion group on Facebook</a>.LINKSRead John Paul Merkle’s petition arguing to <a href="https://www.change.org/p/whoever-decides-this-stuff-rename-helium-to-helion-to-fit-the-names-of-other-noble-gases">change the name of helium to “helion.”</a>Despite being about a quarter century old, this passage from<a href="https://nap.nationalacademies.org/read/9860/chapter/6#30"> “The Impact of Selling the Federal Helium Reserve”</a> has a pretty comprehensive list of the uses and properties of helium.More on the recent sale of the<a href="https://www.nbcnews.com/health/health-news/us-just-sold-helium-stockpile-s-medical-world-worried-rcna134785"> Federal Helium Reserve </a>(NBC News)Physicist William Halperin said the idea of mining helium-3 on the moon was… unlikely… but that hasn’t stopped<a href="https://www.wired.com/story/interlune-helium-3-moon-mining/"> this startup company from trying it</a>. (Wired)Want to learn more about the weird history of American airships? Check out<a href="https://www.youtube.com/watch?v=tjtGB1wC_hY&t=74s"> this film produced by the U.S. government in 1937</a>, when they were still hoping to keep our airship program afloat. 
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