Though a well-regarded physicist, Carl Sagan (1934-1996) is best-known as a writer of popular nonfiction and science fiction and as the host of the PBS series Cosmos. Through his writings and spoken commentary, he worked to popularize interests in astrono
![Cambridge IGCSE Physics – Duncan, Tom [SRG]](https://cdn.pdfdrive.com/assets/thumbs/9bc/9bc913c169f0db09630a0efc47712189-s.jpg "Cambridge IGCSE Physics – Duncan, Tom [SRG]")
