Carl Sagan
American astronomer, cosmologist, astrophysicist, astrobiologist, known for
Cosmos
(1934-1996)
"If there is life, then I believe we should do nothing to disturb that
life. Mars then, belongs to the Martians, even if they are microbes."
-Carl Sagan, COSMOS, episode "Blues for a Red Planet"
He was the faculty adviser for Cornell's Students for the Ethical Treatment of Animals.