In this episode of Science Quickly, we discuss newly revealed U.S. space weapons, growing artificial intelligence safety concerns and the Environmental Protection Agency’s rollback of power plant emissions limits before we end with a look at the tiny sand hoppers reshaping California’s beaches.Recommended Reading:It’s official: The U.S. has weapons in spaceTrump repeals emissions regulations of fossil-fuel power plantsThe real danger in OpenAI’s Hugging Face hackE-mail us at [email protected] if you have any questions, comments or ideas for stories we should cover!Discover something new everyday: subscribe to Scientific American and sign up for Today in Science, our daily newsletter.Science Quickly is produced by Rachel Feltman, Fonda Mwangi, Allison Rodgers and Jeff DelViscio. This episode was edited by Alex Sugiura, with fact-checking by Marielle Issa and Aaron Shattuck. Our theme music was composed by Dominic Smith.Learn more about your ad choices. Visit megaphone.fm/adchoices