Coming back Quote by Ann Druyan

I'm of the opinion that it flies in the face of reason not to believe. The odds are too great against you to not…

— John de Lancie

So many galaxies, so many planets out there in the universe circling so many stars... it just feels like there's a very good chance…

— Brian Greene

It's overwhelmingly likely that life exists on other planets.

— Paul Horowitz

No astrophysicist would deny the possibility of life. I think we're not creative enough to imagine what life would be like on another planet.…

— Neil deGrasse Tyson

I think more and more scientists are becoming convinced that it's very likely that life forms of some kind exist all around the universe…

— Ron Howard

For many centuries, humans have speculated that there might be planetary systems around other stars and that there could be extraterrestrial life there and…

— George Smoot

The reality is that we know that this universe, that our galaxy, has billions of stars. We know that stars have planets. So the…

— Mae Jemison

I think it's fantastically narcissistic to believe that in the entire universe, with all of the planetary systems that we've already discovered and the…

— Ian Bremmer

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

— Pat Buckley

Mathematically speaking, it seems impossible that there isn't life out our planet. If you flick on the news, it certainly seems like we have…

— Ryan Reynolds

Obviously there's some kind of life elsewhere. I don't know whether it would look like anything we recognise but I do believe in aliens.

— Ant McPartlin

Discussing the possibilities of extraterrestrial life: I would love it even if they were short, sullen, grumpy and sexually obsessed. But there just isn't…

— Carl Sagan