Olympic Athletes Swim the Murky Seine, and Astronauts Are (Still) Stuck on the Space Station

The 2024 Summer Olympics in Paris came to a close on Sunday—and swimmers swam the Seine as promised. The two astronauts sent to the International Space Station on a Boeing Starliner craft in June are still in limbo, with no set return flight. The EPA is acting quickly to suspend sales of products that contain the pesticide dimethyl tetrachloroterephthalate over safety concerns. Plus, we discuss a new theory of how the pyramids were built (and no, it doesn’t involve aliens).

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Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Kelso Harper, Madison Goldberg and Jeff DelViscio. This episode was hosted by Rachel Feltman. Our show is edited by Fonda Mwangi with fact-checking by Shayna Posses and Aaron Shattuck. The theme music was composed by Dominic Smith.