Carl Sagan pioneered & promoted SETI, the search for this kind of intelligence
Sagan became world-famous for his popular science books 
and for... [DOC] [TLE] Carl Sagan - Wikipedia [PAR] Carl Edward Sagan was an American astronomer, cosmologist, astrophysicist, 
astrobiologist, ... always advocated scientific skeptical inquiry and the scientific 
method, pioneered exobiology and promoted the Search for Extra-Terrestrial 
Intelligence (SETI).