Earth Quote by Carl Sagan

“The Cosmos extends, for all practical purposes, forever. After a brief sedentary hiatus, we are resuming our ancient nomadic way of life. Our remote…

— Carl Sagan

“It’s so hard to balance in our minds the knowledge that ‘the world’ is mundanely ‘a planet.’ The former is so holy; the latter…

— Douglas Coupland

“Perhaps life will spread throughout our cosmos and flourish for billions or trillions of years—and perhaps this will be because of decisions that we…

— Max Tegmark

We are not learning to view ourselves as an advanced, evolving civilization. That is what we really must learn to do, in due course,…

— Edgar Mitchell

“The Cosmos extends, for all practical purposes, forever. After a brief and sedentary hiatus we are resuming our ancient nomadic way of life. Our…

— Carl Sagan

“The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which…

— Carl Sagan

It's vital as we postulate and work toward exploration and human settlement beyond Earth. I like to think of the possibilities of sustaining humanity's…

— Vanna Bonta

“Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the…

— Arthur Conan Doyle

Our present urgency is to recover a sense of the primacy of the Universe as our fundamental context, and the primacy of the Earth…

— Thomas Berry

“I get the feeling humanity would be thrilled to discover life on another planet. So why not rediscover it here and really cherish it.”

— Tom Althouse

We stand on a great threshold in the human history of space exploration. If life is prevalent in our neighborhood of the galaxy, it…

— Sara Seager

“For a more knowing and informed world, we are becoming forever more complicit based on the evidence presented to us, regarding the demise of…

— Alastair Agutter