It is called Giordano Bruno after the sixteenth-century Roman Catholic scholar who held that there are an infinity of worlds and that many are inhabited. For this and other crimes he was burned at the stake in the year 1600.

Carl Sagan

Carl Sagan

Profession: Astronomer
Nationality: American

Some suggestions for you :

We've arranged a civilization in which most crucial elements profoundly depend on science and technology.

All of us long for a competent, uncorrupt, charismtatic leader. We will leap at the opportunity to support, to believe, to feel good.

Each of us is a tiny being, permitted to ride on the outermost skin of one of the smaller planets for a few dozen trips around the local star.

A book is proof that humans are capable of working magic.

The nature of life on Earth and the search for life elsewhere are two sides of the same question—the search for who we are.

Bishop John Wilkins commented in 1638 on these Athenians: Those zealous idolators [counted] it a great blasphemy to make their God a stone, whereas notwithstanding they were so senseless in their adoration of idols as to make a stone their God.

If there is as a continuum from self-reproducing molecules, such as DNA, to microbes, and an evolutionary sequence continuum from microbes to humans, why should we imagine that continuum to stop at humans?

The illegality of cannabis is outrageous, an impediment to full utilization of a drug which helps produce the serenity and insight, sensitivity and fellowship so desperately needed in this increasingly mad and dangerous world.

It never happens that a new constellation suddenly rises out of the east. There is an order, a predictability, a permanence about the stars. In a way, they are almost comforting.

Fanatical ethnic or religious or national chauvinisms are a little difficult to maintain when we see our planet as a fragile blue crescent fading to become an inconspicuous point of light against the bastion and citadel of the stars.

Once intelligent beings achieve technology and the capacity for self-destruction of their species, the selective advantage of intelligence becomes more uncertain.

You humans have a certain talent for adaptability--at least in the short term.

It almost never feels like prejudice. Instead, it feels fitting and just - the idea that, because of an accident of birth, ‘our' group (whichever one it is) should have a central position in the social universe.

And despite the insignificance of the instant we have so far occupied in cosmic time, it is clear that what happens on and near Earth at the beginning of the second cosmic year will depend very much on the scientific wisdom and the distinctly human sensitivity of mankind.