Now Elon Musk wants to build a city on the moon before building a city on Mars. Biologist Scott Solomon, author of a new book titled "Becoming Martian," sizes up the prospects for building a city anywhere that's beyond Earth.

Aerospace consultant Roger Myers explains why space nuclear power will play a big role in the competition between the U.S. and China to establish bases on the moon in the 2030s.

Space scientist Les Johnson tells the story behind his role in creating "Pluto," the last novel in sci-fi master Ben Bova's Grand Tour series and one of the first works of fiction to incorporate revelations from NASA's New Horizons mission.

Cherokee science-fiction author Daniel H. Wilson blends ancient tales about extraterrestrials with up-to-date speculation about alien visitations in a new novel called "Hole in the Sky."

Washington Post staff writer Christian Davenport, author of "Rocket Dreams," discusses the parallel space races between America and China, and between Elon Musk and Jeff Bezos.

Tim Chawaga, the author of a climate-fiction thriller titled "Salvagia," weaves the implications of future sea-level rise and other high-tech twists into a Florida murder mystery.

Tech pioneer Nathan Myhrvold and paleontologist Thomas Holtz discuss how dinosaur science has evolved over the past three decades - and do a reality check on the latest "Jurassic World" dino-movie.

Mario Juric, director of the University of Washington's DiRAC Institute, explains why astronomers are celebrating the Vera C. Rubin Observatory's "First Look" at the cosmos - and tells you how to join the party.

Emily M. Bender and Alex Hanna, authors of "The AI Con," say the benefits of AI are being played up while the costs are being played down — and they lay out strategies for fighting the hype.

Science-fiction author Ray Nayler talks about his latest book, "Where the Axe Is Buried," a chilling tale of AI-powered repression and resistance that was inspired by current events as well as Nayler's familiarity with authoritarianism.