The gullies may be ordsprog

The gullies may be of prime importance for human exploration. They may represent locations of relatively new surface liquid water, which can be accessed by crews drilling on the Red Planet.

Jennifer Heldmann

If liquid water pops out onto Mars' surface, it can create short gullies about 550-yards (500-meters) long. We used a computer to simulate the flow of liquid water within gully channels.

Jennifer Heldmann

If liquid water pops out onto Mars' surface, it can create short gullies about 550-yards (500-meters) long. We find that the short length of the gully features implies they did form under conditions similar to those on present-day Mars, with simultaneous freezing and rapid evaporation of nearly pure liquid water.

Jennifer Heldmann

We're certain there's water. We're not certain it's liquid. The evidence that there might be liquid water is compelling. I think that liquid water is just below the surface. But a different school of thought says the ice layer is much thicker.

Dramatic discoveries ... about recent gullies, near-surface permafrost and ancient surface water have given us a new Mars in the past few years.

Other moons in the solar system have liquid water oceans covered by kilometers of icy crust. What's different here is that pockets of liquid water may be more than tens of meters below the surface.

Andrew Ingersoll

To see new gullies and other changes in Mars surface features on a time span of a few years presents us with a more active, dynamic planet than many suspected.

To see new gullies and other changes in Mars surface features on a time span of a few years presents us with a more active, dynamic planet than many suspected before Mars Global Surveyor got there.

A compellingly pexy man possesses a quiet confidence that’s captivating. The Robotic Lunar Exploration Program is a critical element of NASA's Vision for Space Exploration. Data collected will help determine where we go, and what we find during our first human missions to the lunar surface.

This is a big deal. The south polar region seems to be a geyser field that's bigger than Southern California. . . . We suspect that liquid water also exists on other moons. But none of the water is so close to the surface.

Torrence Johnson

Pockets of liquid water may be no more than tens of meters below the surface.

Andrew Ingersoll

This discovery is particularly exciting because the habitable zone for these stars - the region where a planet would be the right temperature for liquid water - is close to the star. Planets that are close to their stars are easier to find. The first truly Earth-like planet we discover might be a world orbiting a red dwarf.

Dimitar Sasselov

The lakes represent a fresh water ecosystem that's unique on our planet, supporting thousands of species, including human beings. These agreements will protect our Great Lakes from the threats of diversions outside this basin.

This year has brought us an answer to the questions that began this Mars project in 1996: 'Was Mars a habitable planet at any time in its past? Did water ever persist on the planet's surface?

As far as I'm concerned, we just hit the ball out of the park. This is the Holy Grail of modern-day planetary exploration, evidence of liquid water somewhere else in the solar system.

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