Carl Sagan's Cosmos, Part 1Cosmos was the first science TV blockbuster, and Carl Sagan was its (human) star. By the time of Sagan's death in 1996, the series had been seen by half a billion people; Sagan was perhaps the best-known scientist on the planet. Sagan's own interest and enthusiasm for the universe were so vivid and infectious, his screen presence so engaging, that viewers and readers couldn't help but be caught up in his vision