<https://unemployed-professor.com/2022/05/09/the-density-of-liquid-iron-6-98-g-cm-3-is-lower-than-that-of-solid-iron-7-874-g/>
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<https://unemployed-professor.com/2022/05/09/the-density-of-liquid-iron-6-98-g-cm-3-is-lower-than-that-of-solid-iron-7-874-g/>