The universe in which the classic PBS series Cosmos debuted 40 years ago no longer really exists. In 1980 the Internet was in its infancy, scientists were just starting to sound the alarm about global warming, and present-day scientific realities such as exoplanets, dark energy and the Higgs boson remained entirely theoretical. Co-created by its host, the late astronomer Carl Sagan, with his wife Ann Druyan and their collaborator Steven Soter, the series’ clear-eyed view of the past, present and future of life in the universe has been clouded over by the passage of time.