Watch Series: Nova ScienceNow Released in (2005) - Season 4 produced by USA, The TV Series categorized in Documentary, News, and content rating TV-G with duration 60 min broadcasted as these networks PBS, Streamed at Putlocker & directed by Joshua Seftel, Julia Cort, Terri Randall. Nova ScienceNow is a News magazine version of the long-running and venerable PBS science program Nova. Premiering on January 25, 2005, the series was originally hosted by Robert Krulwich, who described it as an experiment in coverage of \"breaking science, science that's right out of the lab, science that sometimes bumps up against politics, art, culture\". At the beginning of season two, Neil deGrasse Tyson replaced Krulwich as the show's host. Tyson announced he would leave the show and was replaced by David Pogue beginning season 6. - Season 4