Carl Sagan Punished for Popularizing Science

Yet instead, Sagan was punished by the scientific community for his public endeavors. The persecution began as early as the 1960s, when Harvard University denied him tenure. Nobel laureate Harold Urey, a chemist who had previously served as one of Sagan's mentors, helped quash his chances with a nasty letter objecting to Sagan's budding media and outreach efforts.