A single-shot cat contraceptive, and a close look at “dry” chemistry First up this week: an innovation in cat contraception. Online News Editor David Grimm talks with host Sarah Crespi about a nonsurgical pregnancy prevention technique for cats and why such an approach has been a long-term goal for cat population control. Also on this week’s show, we hear about new insights into mechanical chemistry—using physical force to push molecules together. Science Editor Jake Yeston and Yerzhan Zholdassov, a Ph.D. candidate in chemistry at the City University of New York, join Sarah to discuss why pushing things together works and how it might herald an era of solvent-free chemistry. Read a related commentary article. This week’s episode was produced with help from Podigy. About the Science Podcast Authors: Sarah Crespi; David Grimm; Jake Yeston Episode page: https://www.science.org/doi/10.1126/science.adj0996 Learn more about your ad choices. Visit megaphone.fm/adchoices

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“What did the council decide on item 42?” — answered with the speaker and the moment.

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