A third parameter that I already discussed to some extent is entropy, or energy degradation. In chapter 4, I explained the evidence for the universe possessing an extreme amount of specific entropy. This high level of entropy is essential for life. Without it, systems as small as stars and planets would never form. But as extremely high as the entropy of the universe is, it could not be much higher. If it were higher, systems as large as galaxies would never form. Stars and planets cannot form without
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