Strange quark
The first strange particle (a particle containing a strange quark) was discovered in 1947 (kaons), but the existence of the strange quark itself (and that of the up and down quarks) was only postulated in 1964 by Murray Gell-Mann and George Zweig to explain the Eightfold Way classification scheme of hadrons. The first evidence for the existence of quarks came in 1968, in deep inelastic scattering experiments at the Stanford Linear Accelerator Center. These experiments confirmed the existence of up and down quarks, and by extension, strange quarks, as they were required to explain the Eightfold Way.
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".