baryogenesis
noun
ˌba-rē-\
Definition of baryogenesis
: the physical process or processes by which baryons were created in the beginning of the universe One of the mysteries of modern physics is that there appears to be more matter than antimatter in the Universe. It has been suggested that in the early Universe a process called baryogenesis took place, creating excess matter and breaking the symmetry between matter and antimatter.— Eugenie Samuel
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