This week on Entanglements: Should we live on Mars, and beyond? Our hosts talk to Tiffany Vora, a biologist and space advocate who has done three analog Mars simulations, and Kelly Weinersmith, a biologist and the co-author of the book “A City on Mars."

This week on Entanglements: Should tech companies — and the billionaires that often run them — decide for the rest of us how artificial intelligence is deployed? Our hosts dig into the topic with two book authors who have covered AI from essentially opposing perspectives: Greg Beato and Adam Becker.

This week on Entanglements: Should we switch all U.S. elections to ranked choice voting? Our hosts discuss the pros and cons with Deb Otis, director of research and policy for Fair Vote, a non-profit that works on election reform, and David McCune, a professor of mathematics at William Jewell College in Missouri.

This week on Entanglements: Should we run outdoor geoengineering experiments? Our hosts dive into this fiercely debated topic with an atmospheric chemist from Harvard University and a planetary physicist from Oxford University.

This week on Entanglements: Should we try to prevent autism? Our hosts speak with Jill Escher, a philanthropist, president of the National Council on Severe Autism, and parent of two young adults with severe nonverbal autism, and Eric García, the Washington bureau chief at The Independent, who himself is autistic.

We're back! This week on Entanglements: Should we make viruses more dangerous? Our hosts discuss this question, and its contentious history, with a microbiologist from the Johns Hopkins School of Public Health and a virologist from the Pasteur Institute in Paris.

This week on Entanglements: What did we learn from our first season? What’s on deck for the future? Our hosts explore these questions and more in conversations with a special guest.

This week on Entanglements: Is fluoride toxic at low levels? Our hosts explore this question in conversations with a professor from the University of Illinois Chicago College of Dentistry and a neuropsychologist and professor at York University.

This week on Entanglements: Should we unleash GMO mosquitoes? Our hosts explore this question in conversations with a molecular biologist from the University of California, San Diego, and a social scientist from North Carolina State University.

This week on Entanglements: Is the misinformation crisis overblown? Our hosts explore this question in conversations with a social psychologist from the University of Cambridge and a cognitive scientist from the Intstitut Jean Nicod.