The U.S. Department of Defense has sounded the alarm on a worrying hypothetical program from Russia aimed at putting a nuclear weapon into orbit. Associate news editor Allison Parshall explains what we know about nukes in space from a satellite accident and a series of ill-advised low-orbit tests during the cold war.

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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Carin Leong, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman with guest Allison Parshall. Our show is edited by Elah Feder, Alexa Lim, Madison Goldberg and Anaissa Ruiz Tejada, with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.

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