Why Humans Can't Survive Deep Space

00:00 - The Improvised Storm Shelter 00:48 - The 1972 Solar Storm & Lethal Doses 03:22 - The Sailor's Dilemma: Shielding Orion 04:42 - Galactic Cosmic Rays & the Curiosity RAD Data 06:01 - Career Radiation Limits & Secondary Radiation 08:32 - The Silent Decay: Microgravity Bone Loss 10:12 - Countermeasures & the Limits of Exercise 11:58 - Psychological Isolation: Lessons from Concordia Station 15:23 - The Medical Emergency: ISS vs. Mars Evacuation 18:39 - Life Support & Biosphere 2’s Oxygen Crisis 21:49 - Closing the Loop: Water Recycling Limits 22:27 - The Deep Space Reality Gap & Conclusion