1,131 Quotes by Carl Sagan

The total number of stars in the Universe is larger than all the grains of sand on all the beaches of the planet Earth.

Modern Darwinism makes it abundantly clear that many less ruthless traits, some not always admired by robber barons and Fuhrers - altruism, general intelligence, compassion - may be the key to survival.

In the fabric of space and in the nature of matter, as in a great work of art, there is, written small, the artist's signature.

Not all bits have equal value.

Who will speak for Planet Earth?

On the day that we do discover that we are not alone, our society may begin to evolve and transform in some incredible and wondrous new ways.

It is the tension between creativity and skepticism that has produced the stunning and unexpected findings of science.

The well-meaning contention that all ideas have equal merit seems to me little different from the disastrous contention that no ideas have any merit.

It does no harm to the romance of the sunset to know a little bit about it.