Essentially Quote by John M. Grunsfeld

Mars does not have an atmosphere and does not have a magnetic field today, so the planet doesn't have the protection from radiation that…

— David Grinspoon

Long ago Mars was an oasis of running water.Today the Martiansurfaceis a sterile,barren desert. Here on Earth, who knows what climactic knobs we unwittingly…

— Neil deGrasse Tyson

Mars is essentially in the same orbit. Mars is somewhat the same distance from the Sun, which is very important. We have seen pictures…

— Dan Quayle

Mars once was wet and fertile. It's now bone dry. Something bad happened on Mars. I want to know what happened on Mars so…

— Neil deGrasse Tyson

Mars is much closer to the characteristics of Earth. It has a fall, winter, summer and spring. North Pole, South Pole, mountains and lots…

— Buzz Aldrin

When you go to Mars, you need to have made the decision that you're there permanently. The more people we have there, the more…

— Buzz Aldrin

Mars, we know, was once wet and warm. Was it home to life? And what can living and learning to work on its rust-colored…

— Buzz Aldrin

The single best thing about Mars is the reduced gravity. It's 38 percent of Earth's gravity - about one third. Almost never have you…

— Robert J. Sawyer

“The beauty of Mars exists in the human mind. without the human presence it is just a concatenation of atoms, no different than any…

— Kim Stanley Robinson

The Mars Rover sent back stunning photos [last week] indicating the past presence of water. The pictures show tiny splotches of blue on the…

— Argus Hamilton

Is there water still on Mars? I don't have a view on that because we don't have good data to answer that question. One…

— Steve Squyres

Mars tugs at the human imagination like no other planet. With a force mightier than gravity, it attracts the eye to its shimmering red…

— John Noble Wilford