0.833 femtometers also happens to be how close we are to losing our minds


The positively charged proton sitting inside the nuclei of atoms has a radius smaller than a trillionth of a millimeter, according to a paper published in Science on Thursday.

Scientists have been scratching their heads over the size of the proton. Various methods used to measure the subatomic particle’s radius produced different numbers, something boffins dubbed the proton radius puzzle. This latest study concluded its radius is just 0.833 femtometers – that’s 8.33 x 10-16 meters.

“The level of precision required to determine the proton size

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