Before the U.S. Food and Drug Administration was formed in 1906, you might have been more weary of pouring milk over your morning cereal. Milk could be spiked with formaldehyde, while pepper could contain coconut shells, charred rope or floor sweepings. In 1883, Dr. Harvey Washington Wiley, who was appointed chief chemist of the Federal Agriculture Department, began to investigate how manufacturers used additives and unhealthy practices in food—and pulled together “The Poison Squad.” Author Deborah Blum talks about how Wiley along with other scientists, journalists, and advocates fought for the health and safety of the general public. In the past few years, the field of exoplanet discovery has really taken off. But this week, astronomers writing in the journal Science Advances up the ante—describing the possible discovery not of an exoplanet, but of a Neptune-sized moon orbiting an exoplanet. Alex Teachey, co-author of the paper and a graduate student in astronomy at Columbia University, joins Ira to talk about how the observations were performed, and the challenges of the hunt for exomoons. Plus, did you know that some dung beetles carry parasites on their genital—and it may not necessarily be a bad thing? While dung beetles put up with a lot of crap, it’s hard to imagine what good could come from a relationship with a parasite. Cristina Ledón-Rettig, Assistant Research Scientist at Indiana University, joins Ira to discuss her work. Subscribe to this podcast. Plus, to stay updated on all things science, sign up for Science Friday's newsletters.

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