NATS 1525 Lecture Notes - Lecture 9: Falsifiability, Rare Earth Hypothesis, Zoo Hypothesis

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Class 9: used to have water, used to have a magnetic field, smaller than earth cooled down lost magnetic field and atmosphere = cant have water. Just have to find one instance when its not true. Drakes equation: terms, lol nah, we do not have a reasonable estimate for any terms, optimistic = one civ is born every year, problem. If there is one intelligent race living on a planet, they can colonize the galaxy: 1 million to 5 million years.

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