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Particles of Thought
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How To Recognize Alien Life | Peter Girguis

10 min•26 november 2025

There’s no single ‘smoking gun’ for life beyond Earth. Microbiologist Peter Girguis explains the subtle fingerprints scientists hunt for—and why finding them on Mars could change everything.

For more, check out the extended interview with Peter Girguis.

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Why Dark Matter Matters
•28 min
How Many Leaves Are on a Tree? | Kirk Johnson
•2 min
The Air You Breathe Is Bacteria Poop | Peter Girguis
•1 min
The Fish That Could Walk | Sean B. Carrol
•2 min
How Close Can You Safely Get to a Black Hole? | Janna Levin
•2 min
A New Law of Nature? | Robert Hazen & Michael Wong
•3 min
AI Is Coming for Blue Collar Jobs | Hany Farid
•2 min
What Species Can We De-Extinct? | Beth Shapiro
•2 min
Were Dinosaurs Able to Sing? | Erich Jarvis
•1 min
Space-Time Expansion, Explained | Adam Riess
•2 min

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