The World Is Constantly Running Out Of Helium
b'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.
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