
 Decoder with Nilay Patel Recode Decode: Caleb Scharf
 Feb 19, 2020 
 Caleb Scharf, the Director of Astrobiology at Columbia University, discusses the stark realities of human survival on Mars, highlighting the dangers of radiation and the challenges of colonization. He contrasts government space efforts with private initiatives and questions the viability of space tourism. Scharf emphasizes the health risks astronauts face, including bone density loss and radiation exposure, and underlines the importance of understanding astrobiology in preparing for life beyond Earth. 
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Mars Colonization: A Reality Check
- Elon Musk's Mars colonization plan needs a realistic discussion about its dangers.
 - Mars is a hostile environment, unlike Earth, posing significant survival challenges.
 
Radiation Hazards on Mars
- Mars's brutal radiation, lack of atmosphere and magnetic field pose health risks.
 - Underground living with thick Martian soil shielding is necessary for protection.
 
What is Astrobiology?
- Astrobiology studies life in the universe, including origins, evolution, and future.
 - It combines astronomy, biology, and other fields, driven by solar system exploration and exoplanet discoveries.
 
