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Here’s something to think about as you kick off 2025: ✨We are all stardust.✨ Every atom of oxygen in our lungs, of carbon in our muscles, of calcium in our bones, of iron in our blood—was created inside a star before Earth was born. Image: NASA Hubble Space Telescope, CC BY 2.0, flickr

What about fluorine or chlorine?

In very big and old stars... the chlorine production process is not well known, fluorine maybe in wolf rayet class stars

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