Arthur C. Clarke Quotes

Perhaps we've never been visited by aliens because they have looked upon Earth and decided there's no sign of intelligent life.

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 believe that there may be intelligent life on other planets.

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

Will searching for distant messages work? Is there intelligent life out there? The SETI effort is worth continuing, but our common-sense beacons approach seems more likely to answer those questions.

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.

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

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

I don't see why there is no intelligent alien life in the universe.

For many centuries, humans have speculated that there might be planetary systems around other stars and that there could be extraterrestrial life there and even intelligent being. However, those were simply speculations, and now we have evidence for the first part of these ideas.

Another random thing I do is the search for extraterrestrial intelligence, or SETI. And you may be familiar with the movie 'Contact,' which sort of popularized that. It turns out there are real people who go out and search for extraterrestrials in a very scientific way.

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

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

I don't believe in a conspiracy to hide the existence of extraterrestrial life.

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.

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.

Are we alone? Many, many people on planet Earth want to know. We are on the cusp of being able to answer that question... because of the investments we're making in space technology.

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.

Life outside of Earth is probably going to be really hard to find.

While NASA talks about 'Are we alone?' as a number one question, they are putting zero money into searching for intelligent life. There's a big disconnect there.

The discovery of any kind of life [in Space] at all would be a tremendous watershed moment in biology, as well as all of science.

For all we know, the aliens have already done this and unwittingly concluded that there was no intelligent life on Earth. They would now be looking elsewhere. A more humbling possibility would be if aliens had become aware of the technologically proficient species that now inhabits Earth, yet they had drawn the same conclusion.

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 would be very ashamed of my civilization if we did not try to find out if there is life in outer space.