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245 | Solo: The Crisis in Physics
Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
The Anthropic Principle and the Multiverse
Most people before 1998 thought that we would eventually show that the cosmological constant is zero. But then it's not zero, probably, if the vacuum energy really is the reason why the universe is accelerating. So guess what? There is this old idea that people have been banded around called the anthropic principle and the multiverse. The idea that if you have in the universe different regions where the local laws of physics are different, then by a selection effect, we complicated, intelligent, complex beings would only find ourselves in some subset of those possibilities. It's environmental selection. In the solar system there are conditions that are hospitable to life and conditions that are inhospitable. Of
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