Civilization Quote by Paul Davies

We send messages all the time, free of charge. There's a big shell out there now, 80 light-years around us. A civilization only a…

— Frank Drake

Supposing we knew that up there is some alien civilization and it's sending radio signals our way we should not tell the public where…

— Paul Davies

I think it quite likely that we are the only civilization within several hundred light years; otherwise we would have heard radio waves.

— Stephen Hawking

In any case, the leading edge of our "on purpose" radio signals is 30 light-years away and, if intercepted, may mend the aliens' image…

— Neil deGrasse Tyson

Radio astronomers are aware in the back of their minds that if there are other civilizations out there in space, it might be the…

— Jocelyn Bell Burnell

Give consideration to the fact that alien astronomers could have scrutinized Earth for more than 4 billion years without detecting any radio signals, despite…

— Seth Shostak

That would be such a life-changing thing, for us all to know that there are other beings out there who we could potentially communicate…

— Paul Allen

“What an interesting and exciting thought. We may be only one of millions of advanced civilizations. Unfortunately, space being spacious, the average distance between…

— Bill Bryson

It's abundantly clear that we already have extraterrestrials living among us, and people are stepping forward who can communicate with them.

— Sylvia Browne

“Our television signals leave this planet and go out into space...the signals spread out from the earth in spherical waves, a little like ripples…

— Carl Sagan

Perhaps the inevitable tragedy of our complex civilization is that we must be specialists in our fields - and our fields have become increasingly…

— Joyce Carol Oates

The best idea ever thought of in the history of humanity is useless unless someone communicates it. It will die in the test tube.…

— Phil Plait