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Marathon Mouse/Dinosaur Plague/Franklin Chang-Díaz/Space Storms
Watch how an "exercise pill" turns couch-potato mice into athletes, explore a controversial new theory of what killed the dinosaurs, meet the first Latino-American astronaut, and find out why the beautiful northern lights signal a threat to our electronic society.
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Other episodes for this season
![Diamond Factory / Anthrax Investigation / Auto-Tune / Luis Von Ahn](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Hunt for Alien Earths / Art Authentication / Maydianne Andrade / Autism Genes](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Marathon Mouse/Dinosaur Plague/Franklin Chang-Díaz/Space Storms](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Picky Eaters/Capturing Carbon/Sea Lions and Walruses/Sangeeta Bhatia](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Moon Smasher/Secrets in the Salt/Bird Brains/Lonnie Thompson](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Public Genomes/Algae Fuel/Arctic Ocean Seafloor/Yoky Matsuoka](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Saving Hubble Update/Gangster Birds/Alfredo Quiñones-Hinojosa/How Memory Works](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)
![Earthquakes in the Midwest/Sleep/Sang-Mook Lee/First Primates](https://image.tmdb.org/t/p/w300/dcgbEl9uCsXWywG9M1kZi70xnY0.jpg)