This Week in Space 220

This week, we cover how Starship Flight 13 finally prepares to launch amid a legal battle over SpaceX's proposed land swap at Starbase, plus a Chinese Long March 3B rocket gets struck by lightning during liftoff, yet still delivers its satellite safely. Then, guests Dr. Pascal Lee and astrobiologist Dr. Penny Boston join the show to mark the 50th anniversary of Viking 1's landing on Mars and revisit the mission's groundbreaking life-detection experiments and the decades-long controversy over what they actually found. The conversation traces Mars exploration from the earliest Mariner flybys through Viking's ambiguous, still-debated results—later explained by perchlorates in the Martian soil—and the fierce scientific rivalry the findings sparked. Join us!

Headlines:

• SpaceX Starship Flight 13 faces engine and weather delays ahead of launch
• SpaceX land swap proposal sparks conservation group lawsuit over Rio Grande Valley wildlife preserve
• Chinese Long March rocket survives dramatic lightning strike during launch

Main Topic: 50th Anniversary of Viking Mars Landers—Search for Life on Mars

• The evolution of Mars exploration from telescopes to Viking lander
• Early Mars missions: Mariner flybys, Soviet attempts, and breakthroughs in orbital imaging
• Viking 1 and 2: Ambitious design, life-detection experiments, and landing impact
• Mixed public and scientific reactions to Viking’s first iconic Mars surface images
• Technical overview of the Viking biology experiments and their controversial results
• The unresolved debate: Did Viking detect life or chemical reactions on Mars?
• Personal accounts of key scientists, scientific disputes, and the “Wolf Trap” experiment that never flew
• Lessons from Viking: Limitations of technology, extremophile discoveries, and shifting strategies for detecting life
• The scientific case for seeking life in Martian caves and subsurface environments
• Critique of current and future Mars missions: Perseverance rover findings and value of Mars Sample Return
• Exploring planetary protection, contamination risks, and the challenges of certifying Martian samples=
• Key takeaways for future missions—bold searches, new technologies, and the ongoing quest for answers

Download or subscribe to This Week in Space at https://twit.tv/shows/this-week-in-space.

Join Club TWiT for Ad-Free Podcasts!
Support what you love and get ad-free audio and video feeds, a members-only Discord, and exclusive content. Join today: https://twit.tv/clubtwit

Links

• SpaceX will now try to launch critical Starship Flight 13 test today after delays. Here's what to expect.
• 'The court has to intervene now': Indigenous groups and conservationists condemn SpaceX's South Texas land swap
• Lightning strike on Chinese rocket captured in epic launch photo
• ‘Triumph of Mariner 4’
• Slice of History - 50 Years of Mariner 9 in Orbit
• Viking Lander
• Life on Mars detected ?... Viking 1...
• Viking lander biological experiments