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        Part of NOVA
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        The Elements: Forged in Stars

        Fusion, which occurs when atomic nuclei combine to form new elements, is extremely powerful. All the stars in the universe, including the Sun, are nuclear furnaces fueled by fusion. Through fusion, stars are responsible for forming all the naturally occurring elements heavier than hydrogen and helium -- before stellar nucleosynthesis, only the lightest elements existed in the universe. This video segment adapted from NOVA illustrates the critical role that stars play in creating the elements. This video is available in both English and Spanish audio, along with corresponding closed captions.

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