"Deposits of unfinished grief reside in more American hearts that I ever imagined. Until these pockets are opened and their contents aired openly, they block unimagined amounts of human growth and potential. They can give rise to bizarre and unexplained behavior which causes untold internal stress."

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At the heart of science is an essential balance between two seemingly contradictory attitudes-an openness to new ideas, no matter how bizarre or counterintuitive they may be, and the most ruthless skeptical scrutiny of all ideas, old and new. This is how deep truths are winnowed from deep nonsense.

— Carl Sagan