the.com/positron
the electron's antimatter twin — same mass, opposite charge, mutual destruction on contact.
means a subatomic particle identical to an electron but with a positive charge, the electron's antiparticle in the standard model.
from predicted in 1928 by paul dirac's equation, which allowed for negative-energy solutions that implied a mirror particle; carl anderson found it in cosmic ray tracks in 1932 and named it, winning a nobel prize for confirming antimatter existed.
discovery year1932, by carl anderson
medical usepowers pet scans in hospitals daily
annihilationmeets electron, both vanish into pure energy
asimov borrowed itnamed his robots positronic brains