Extraterrestrial Life

Extraterrestrial life As biologists learn about life on Earth in all its diversity, and at the rate that new planets are being discovered the search for life elsewhere grows more steadily pressing. We have discovered organisms on the Earth that seem tenacious and tough almost to a fault; they thrive in the most seemingly adverse conditions imaginable, and organisms so fragile and specialized so as to exist in only the most isolated and pristine environments. …

…powers would increase greatly if we were to find organisms out there of different composition or different fundamental structure than those on earth, but as yet we haven’t. But if Carl Sagan is right (and I believe he is) in stating that there are billions of planets out there then statistics would seem to stand on the side of finding not only a few organisms, but a diversity as great as the universe itself.