<sod> American [[astronomer]] ([[1936]]-[[1996]]) who pioneered [[exobiology]] and promoted Search for Extraterrestrial Intelligence ([[SETI]]) and science in general. He is less well known for his [[skepticism]].
 
 Carl Sagan was a professor and lab director at [[Cornell University]]. He contributed to most of the [[unmanned space missions]] that explored our [[solar system]]. His idea was to add an unalterable and universal message on the spacecraft that could be understood by an extraterrestrial intelligence.  He was also well known as a coauthor of the paper that warned of the dangers of [[nuclear winter]].  
 
 <eod> <sod>American [[astronomer]] ([[1934]]-[[1996]]) who pioneered [[exobiology]] and promoted Search for Extraterrestrial Intelligence ([[SETI]]) and science in general. He is less well known for his [[skepticism]].
 
 Carl Sagan was a professor and lab director at [[Cornell University]]. He contributed to most of the [[unmanned space missions]] that explored our [[solar system]]. His idea was to add an unalterable and universal message on the spacecraft that could be understood by an extraterrestrial intelligence.  He was also well known as a coauthor of the paper that warned of the dangers of [[nuclear winter]].  
 
 <eod>