<sod>  
 He was also well known as a coauthor of the paper that warned of the dangers of [[nuclear winter]]. He also perceived [[global warming]] as a growing, man-made danger and likened it to the natural development of Venus into a hot life-hostile planet through greenhouse gases.
 
He wrote and narrated the highly popular twelve part PBS television series <i>[[Cosmos]]</i>; he wrote also books to popularise science (<i>Broca's Brain</i>, <i>The Dragons of Eden</i>, etc.)  and a novel, <i>Contact</i>, that became a best-seller and was adapted to a film starring [[Jodie Foster]]. The film won the 1998 [[Hugo award]].   From <i>Cosmos</i> Sagan became associated with the catchphrase "billions and billions" which he never used in the television series.
 
 After a long and difficult fight with [[myelodysplasia]], Sagan passed away at the age of 62, on Dec. 20th 1996.
 
 <eod> <sod> 
 He was also well known as a coauthor of the paper that warned of the dangers of [[nuclear winter]]. He also perceived [[global warming]] as a growing, man-made danger and likened it to the natural development of Venus into a hot life-hostile planet through greenhouse gases.
 
He wrote and narrated the highly popular thirteen part PBS television series <i>[[Cosmos]]</i>; he wrote also books to popularise science (<i>Broca's Brain</i>, <i>The Dragons of Eden</i>, etc.)  and a novel, <i>Contact</i>, that became a best-seller and was adapted to a film starring [[Jodie Foster]]. The film won the 1998 [[Hugo award]].   From <i>Cosmos</i> Sagan became associated with the catchphrase "billions and billions" which he never used in the television series.
 
 After a long and difficult fight with [[myelodysplasia]], Sagan passed away at the age of 62, on Dec. 20th 1996.
 
 <eod>