What’s the Smallest Particle in the Universe?
SMRTR summary
Subatomic particles form nearly everything we experience, yet their size is beyond everyday comprehension. The Standard Model depicts fundamental particles as zero-dimensional points existing as probability clouds, not definable objects. Measuring by mass, massless photons could be the "smallest" bosons, while neutrinos—about one millionth of an electron's mass—might be the "smallest" fermions. Scientists test particles for internal structure, but fundamental particles seem truly indivisible, with the concept of size becoming almost meaningless at the quantum level.
SMRTR provides this summary for quick context. The original article belongs to Scientific American.
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