Stephen Hawking Quotes

I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.

I've always thought that we, as human beings, would be naive and arrogant to pretend that we're the only life form in the galaxy.

To me, it's the kind of interesting question the human race should be investing in. Is there intelligent life out there? Are there other beings out there?

It would be selfish to believe that we are the only intelligent life in the universe.

With 'Extinction Machine,' I wanted to start some conversations about whether we're alone in the universe and what that might mean.

How can the human race be, like, the only living form in the universe? There have to be other life forms out there. I believe it.

It's presumptuous for us to think we are the only beings in the cosmos.

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

I don't think we are the only planet that has life.

The surest sign that intelligent life exists elsewhere in the universe is that it has never tried to contact us.

I think there's all kinds of life out there, including intelligent life, but the reason we haven't found each other is because of vast distances.

I think that it would be unwise of us not to believe that there is life outside of us, intelligent life. And so I do believe in aliens.

It's naive to think we're the only living beings in this universe.

The existence of life beyond Earth is an ancient human concern. Over the years, however, attempts to understand humanity's place in the cosmos through science often got hijacked by wishful thinking or fabricated tales.

It doesn't matter how much faith you have or don't have. I just don't buy the idea that we're alone. There's got to be some form of life out there.

Of course I believe in aliens. I think it's very egocentric to think that there's nothing else with intelligence in the whole universe.

I actually think the chances that we'll find E.T. are pretty good.

It's just too egotistical to think that we are the only lifeform in the universe.

The universe is large and old, and the ingredients for life as we know it are everywhere, so there's no reason to think that Earth would be unique in that regard. Whether of not the life became intelligent is a different question, and we'll see if we find that.

There may be aliens in our Milky Way galaxy, and there are billions of other galaxies. The probability is almost certain that there is life somewhere in space.

People quite often think of the question 'Are we alone in the universe?' in terms of other civilizations out there: life forms that have reached at least our level of technological development.

I think it'd be pretty unrealistic to think we're the only planet in the world with thinking beings. It's kind of a strange conceit. Especially given how many universes there must be.

Up to this day, there has been no proof of the existence of any intelligence other than the human.

Galactic plankton is undoubtedly out there, but it's statistically highly likely there's also another intelligent civilisation out there somewhere. Unfortunately, the distances and time differences are so great, communication might remain impossible.

Theoretically, there are planets with an environment that can support life. As yet there is no evidence that there indeed is life on other planets. It's only a matter of time before we get to know.