Carl Sagan

Every time you look up at the sky, every one of those points of light is a reminder that fusion power is extractable from hydrogen and other light elements, and it is an everyday reality throughout the Milky Way Galaxy.

Carl Sagan

Except for fools and madmen, everyone knows that nuclear war would he an unprecedented human catastrophe.

Carl Sagan

For small creatures such as we the vastness is bearable only through love.

Carl Sagan

For years I’ve been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

Carl Sagan

Gullibility kills.

Carl Sagan

He didn’t want to believe. He wanted to know.

Carl Sagan

History is full of people who out of fear, or ignorance, or lust for power has destroyed knowledge of immeasurable value which truly belongs to us all. We must not let it happen again.

Carl Sagan

Human beings have a demonstrated talent for self-deception when their emotions are stirred.

Carl Sagan

Human history can be viewed as a slowly dawning awareness that we are members of a larger group.

Carl Sagan

Humans – who enslave, castrate, experiment on, and fillet other animals – have had an understandable penchant for pretending animals do not feel pain.

Carl Sagan