In 1999, American scientist Henry W. Kendall died.
Henry Kendall, together with his colleagues Richard E. Taylor and Jerome I. Friedman, won the 1990 Nobel Prize in Physics for experiments which proved the existence of fundamental building bricks, called quarks, as constituents of the neutron and proton of everyday matter.
Learn more at http://www.independent.co.uk/arts-entertainment/obituary-professor-henry-w-kendall-1083236.html
