Physicists finally calculated where the proton’s mass comes from
Only 9 percent of the subatomic particle’s bulk comes from the mass of its quarks
![an illustration of protons in the nucleus of an atom](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/11/112018_ec_proton-mass_feat_free.jpg?fit=860%2C460&ssl=1)
MASSIVE UNDERTAKING Using a technique called lattice QCD, scientists figured out how protons (illustrated here in the nucleus of an atom) get their mass.
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