Half of the atoms in your body were made outside the Milky Way.
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Very interesting! Source? Thinking out loud: By mass, we're mostly carbon and oxygen, which were most likely made nearby by a predecessor star, I believe. By number of atoms, we're mostly hydrogen, which ought to date to very early in the Universe, before there was a Milky Way
Hmm. So I guess that makes sense: the hydrogen atoms are ~half (by number) in our body, and they were made before there was a Milky Way. That's a really cool fact, thanks for sharing!
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The explanation is way cooler: Intergalactic winds!https://www.theguardian.com/science/2017/jul/27/we-are-all-made-of-stars-half-our-bodies-atoms-formed-beyond-the-milky-way …
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