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(BBN), was the first type of nucleogenesis to occur in the universe. The vast majority of matter in the universe even today (about 74%) is hydrogen produced by BBN, while another 24% is helium. The first stars (called Population III stars) to form in the universe were therefore formed almost entirely of hydrogen and helium, with trace amounts of lithium, beryllium, and boron. (Some Li, Be, and B currently

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