Arthur C. Clarke Quotes

And as I have always said, the only thing more scary than knowing we are not alone in the universe is knowing we are alone in the universe.

Human beings have long wondered whether they are alone in the universe.

Two possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying.

Sometimes I think we're alone. Sometimes I think we're not. In either case, the thought is staggering.

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

For each one of us stands alone in the midst of a universe.

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

The Eerie Silence: are we alone in the universe?

When I talk of the purpose of life, I am thinking not only of human life, but of all life on Earth and of the life which must exist upon other planets throughout the universe.

The belief that there are other life forms in the universe is a matter of faith. There is not a single shred of evidence for any other life forms, and in forty years of searching, none has been discovered. There is absolutely no evidentiary reason to maintain this belief.

I believe in aliens. I think it would be way too selfish of us as mankind to believe we are the only lifeforms in the universe.

We can never prove that we're alone in the universe. But the Allen Telescope Array could prove that we're not.

Should we find a second form of life right here on our doorstep, we could be confident that life is a truly cosmic phenomenon. If so, there may well be sentient beings somewhere in the galaxy wondering, as do we, if they are not alone in the universe.

There are still so many questions to answer. When you look at any part of the universe, you have to feel humbled.

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.

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

It would seem staggeringly arrogant to think we were the only ones in the universe, but at the same time, I don't know if contact has been made yet or not because you think something like that would be hard to cover up. I'm still on the fence. I keep an open mind about all of these things.

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 about intelligent life on Earth, especially when I think about the question of what truly intelligent life might look like elsewhere in the universe.

The building blocks of life are readily available throughout the universe.

I believe we are the only sentient beings in the universe, and I believe that 500 years from now, we will still be the only sentient beings around.

As the romance of manned space exploration has waned, the drive today is to find our living, thinking counterparts in the universe. For all the excitement, however, the search betrays a profound melancholy - a lonely species in a merciless universe anxiously awaits an answering voice amid utter silence.

I suppose my interest in looking for life elsewhere in the universe really dates back to my teens. What teenager doesn't look up at the sky at night and think am I alone in the universe? Well most people get over it, but I never did and though I made a career more in physics and cosmology than astrobiology I've always had a soft spot for the subject of life because it does seem so mysterious.

That is a big question we all have: are we alone in the universe? And exoplanets confirm the suspicion that planets are not rare.

Life is a solitude.

Time is the backdrop of our lives and the very fabric of the cosmos.