Arrogant Quote by Robert K. G. Temple

“Early SETI efforts were marked by overly optimistic estimates of the probable number of extraterrestrial civilizations in our galaxy. In light of new findings…

— Peter Schenkel

[My study of the universe] leaves little doubt that life has occurred on other planets. I doubt if the human race is the most…

— Harold Urey

The human race may be the only intelligent beings in the galaxy.

— Stephen Hawking

“There's a strange contradiction revealed by the naivete and kindness demonstrated by humanity when faced with the universe: On Earth, humankind can step onto…

— Cixin Liu

Statistically it's a certainty there are hugely advanced civilizations, intelligences, life forms out there. I believe they're so advanced they're even doing interstellar travel.…

— Story Musgrave

Coming to grips with the reality that our planet is not the only one harboring intelligent life the universe.

— Franklin D. Roosevelt

“On Earth, humankind can step onto another continent, and without a thought, destroy the kindred civilizations found there through warfare and disease. But when…

— Liu Cixin

I believe that there may be intelligent life on other planets.

— Pat Buckley

There are 400 billion stars out there, just in our galaxy alone. If just one out of a million of those had planets, and…

— Jodie Foster

I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.

— Arthur C. Clarke

“The Cosmos may be densely populated with intelligent beings. But the Darwinian lesson is clear: There will be no humans elsewhere. Only here. Only…

— Carl Sagan

It is said that Mahatma Gandhi, when asked about Western civilization, remarked, 'I think it would be a good idea.' That's how I feel…

— David Grinspoon