Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
303 | AMA | February 2025
Sean Carroll
So you can ask the question, how long does it take to sort of randomly go throughout the whole Earth's atmosphere? And the answer is less than 2,000 years. So that's why there is some quantitative sensibility to that kind of statement, even if you can't actually look at the individual molecules.
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