Quark
The quark model was independently proposed by physicists Murray Gell-Mann and George Zweig in 1964. Quarks were introduced as parts of an ordering scheme for hadrons, and there was little evidence for their physical existence until deep inelastic scattering experiments at the Stanford Linear Accelerator Center in 1968. Accelerator experiments have provided evidence for all six flavors. The top quark, first observed at Fermilab in 1995, was the last to be discovered.
Soo-Bong Kim
Kim was a postdoctoral fellow and a research investigator at the University of Michigan before moving to Boston University in 1996. He took up his current position at Seoul National University in 1998. He jointly led the efforts of discovering the top quark in 1994 and measuring its mass in 1995 using the Fermilab Tevatron hadron collider as a member of the CDF collaboration. The top quark was the heaviest fundamental fermion yet to be observed before the experiment. The observation and mass measurement of the particle opened a new field of "top quark physics".