Carl Edward Sagan, Ph.D. (November 9, 1934 ? December 20, 1996) was an American astronomer, astrochemist, author, and highly successful popularizer of astronomy, astrophysics and other natural sciences. He pioneered exobiology and promoted the Search for Extra-Terrestrial Intell... |
![Carl Sagan [apod.nasa.gov]](/tmp/swotti/cacheY2FYBCBZYWDHBG==UGVVCGXLLVBLB3BSZQ==/151.jpg "Carl Sagan [apod.nasa.gov]")
