As the title says. Thank you!
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Our bodies rely on relatively heavy elements like iron and zinc to function. We know that when the universe started, there was only energy. We know that as the universe cooled over hundreds of thousands of years, energy started to colaesce into particles of matter. We know that couldn’t have created heavy elements. We know stars work on nuclear fusion. We know fusion creates heavier elements out of lighter ones. Analysis of the light stars produce and measures of their mass and diameter tell us that as stars run out of hydrogen to fuse, they start fusing heavier stuff to result in even heavier products. We know that when fusion finally fails, stars go supernova. We know that stars going supernova scatters material from their cores out into space. We know that there aren’t any natural processes that creates nuclear fusion other than stellar fusion. We know there are no natural process that create the heavier elements we’re made of other than stellar fusion.
Therefore, since we know things like iron and zinc can only be produced in the core of stars, and we know we’re made of iron and zinc and other things like that, we know that what we’re made of came from stars.
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