Like Quote by David Grinspoon

NASA should start thinking about this planet.

— Wally Schirra

I hope that someday we will find evidence that there is intelligent life among humans on this planet.

— Sylvia Earle

I believe that there may be intelligent life on other planets.

— Pat Buckley

The atmosphere is great for people - it allows us to survive - but it's a real headache for astronomers.

— Andrea M. Ghez

It's a pretty widely-accepted notion that the atmosphere is a ridiculously complex system, and the best we can do with our models is a…

— Jamais Cascio

That planet has a considerable but moderate atmosphere. So that the inhabitants probably enjoy a situation in many respects similar to ours.

— William Herschel

We could have human intelligence in orbit around Mars, building things there.

— Buzz Aldrin

Create an atmosphere in which anything is possible.

— Thomas Raymond Kelly

We only have to look at ourselves to see how intelligent life might develop into something we wouldnt want to meet. I imagine they…

— Stephen Hawking

Mars would seem, to me, to be the best place to focus our collective effort as a species... I think people would like to…

— James Ransone

The atmosphere almost looks like an eggshell on an egg, it's so thin. We know that we don't have much air - we need…

— Eileen Collins

Humanity has at least a dim, and growing, cognisance of the effects of its presence on this planet. The possibility that we might integrate…

— David Grinspoon