All Civilizations Become Either Spacefaring Or Extinct.

The Suppression Of Uncomfortable Ideas May Be Common In Religion Or In Politics, But It Is Not The Path To Knowledge; It Has No In The Endeavor Of Science. We Do Not Know In Advance Who Will Discover Fundamental Insights.

Our Ancestors Lived Out Of Doors. They Were As Familiar With The Night Sky As Most Of Us Are With Our Favorite Television Programs.

If The Constellations Had Been Named In The Twentieth Century, I Suppose We Would See Bicycles And Refrigerators In The Sky.

The Earth Is A Very Small Stage In A Vast Cosmic Arena.

Writing Is Perhaps The Greatest Of Human Inventions.