Science demands evidence, and in the absence of evidence, it... - Carl Sagan

This quote is attributed to Carl Sagan.

"Science demands evidence, and in the absence of evidence, it's honest to say we don't know."

Carl Sagan Knowledge

Astronomer and Science Communicator American 1934–1996

More from Carl Sagan

"Somewhere, something incredible is waiting to be known."

"The cosmos is a vast living body, of which we are still parts."

"Science is a way of thinking much more than it is a body of knowledge."

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

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."