Where did the heavy elements like iron and calcium in human bodies originate?
Answer
Within the cores of stars that lived and died previously.
Stars act as cosmic chemical factories. Through the process of stellar evolution, stars fuse lighter elements into heavier ones, such as carbon, nitrogen, oxygen, and iron. When these stars die, they scatter these elements into space, where they eventually become part of new stars and planetary systems. Consequently, elements essential for life are remnants of the stars that existed before our solar system.
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