History of Antimatter
- 1898
- A.Schuster surmises the existence of antiatoms,
with properties exactly opposite to those of ordinary atoms;
antiatoms should attract each other gravitationally,
but might be repelled by ordinary matter
- 1928
- P.A.M.Dirac proposes the existence of positively charged electrons, nowadays
known as anti-electron or positron
- 1932
- C.D.Anderson discoveres the 'positive electron' while measuring
cosmic rays in a Wilson chamber experiment
- 1955
- O.Chamberlain, E.Segrè, C.Wiegand, and T.Ypsilantis discover the antiproton
- 1995
- Antiproton and positron combined to antihydrogen for the first time