খাদ্যাভ্যাসের ইতিহাস, কোথায় শুরু হয়?
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Quarks are among the smallest particles in the universe, and they carry only fractional electric charges. Scientists have a good idea of how quarks make up hadrons, but the properties of individual quarks have been difficult to tease out because they can't be observed outside of their respective hadrons.
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