A photon-rich early Universe allowed for the formation of stable atomic nuclei. Too few photons would have led to lifelessness, as hydrogen would entirely fuse into helium.
The existence of a sufficient matter-antimatter asymmetry, where there's about one proton for every 1.6 billion photons, is crucial for creating heavy elements necessary for rocky worlds.
Dark matter functions as 'cosmic glue,' holding galaxies together and ensuring that supernova ejecta do not escape, which is essential for the formation of late-generation stars.
The stability of protons, which in theory can decay, is significant for cosmic life, as too rapid decay would render normal matter unstable, hindering life formation.
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