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We believe that the only elements formed during the Big Bang was hydrogen (about 97%), helium (about 2%) and lithium (less than 1%). These are the three simplest elements.

We believe that all of the heavier elements were created in the cores of stars that later exploded, scattering their mass across the galaxy. So all of the carbon in our bodies, the iron in our blood and the gold in our jewelry have been through the centers of stars at least once.

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11y ago

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