[ETL]

Much of the mass of an atom actually comes from the anti-matter inside

I've never heard that before. Do you have a source?

[Reeses]

Protons’ antimatter is even more lopsided than we thought: https://www.sciencenews.org/article/proton-antimatter-lopsided-quark-antiquark

[Reeses]

Decades-Long Quest Reveals Details of the Proton’s Inner Antimatter: https://www.quantamagazine.org/protons-antimatter-revealed-by-decades-old-experiment-20210224/