A fact is a simple statement that everyone believes. It is innocent, unless found guilty. A hypothesis is a novel suggestion that no one wants to believe. It is guilty, until found effective.
Edward Teller

A satellite has no conscience.
Edward R. Murrow

A scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it.
Max Planck

A year spent in artificial intelligence is enough to make one believe in God.
Alan Perlis

Adventure upon all the tickets in the lottery, and you lose for certain; and the greater the number of your tickets the nearer your approach to this certainty.
Adam Smith

Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know it so it goes on flying anyway.
Mary Kay Ash

Anthropology demands the open-mindedness with which one must look and listen, record in astonishment and wonder that which one would not have been able to guess.
Margaret Mead

Anthropology was the science that gave her the platform from which she surveyed, scolded and beamed at the world.
Jane Howard

Anybody who has been seriously engaged is scientific work of any kind realizes that over the entrance to the gates of the temple of science are written the words: 'Ye must have faith.'
Max Planck

Anyone who attempts to generate random numbers by deterministic means is, of course, living in a state of sin.
John von Neumann

Bad times have a scientific value. These are occasions a good learner would not miss.
Ralph Waldo Emerson

Bush reiterated his stand to conservatives opposing his decision on stem cell research. He said today he believes life begins at conception and ends at execution.
Jay Leno

Each problem that I solved became a rule, which served afterwards to solve other problems.
Rene Descartes

Every great advance in science has issued from a new audacity of imagination.
John Dewey

Facts are the air of scientists. Without them you can never fly.
Linus Pauling

Few tragedies can be more extensive than the stunting of life, few injustices deeper than the denial of an opportunity to strive or even to hope, by a limit imposed from without, but falsely identified as lying within.
Stephen Jay Gould

For NASA, space is still a high priority.
Dan Quayle

From now on we live in a world where man has walked on the Moon. It's not a miracle; we just decided to go.
Tom Hanks

Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.
Archimedes

Half of the modern drugs could well be thrown out of the window, except that the birds might eat them.
Martin Henry Fischer