The aim of this paper is to present dr. Carl Sagan's ethical issues within his own exobiological researches, and the criticism of such a view. We shall start from Dr. Sagan's anthropological definition where his view on intelligence as demarcation criteria between species, ecological issues on preservation of life on Earth, terraforming, exobiology, and SETI project (search for extraterrestrial intelligencies), up to the abortion controversy, will be set forth.
