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This drawing shows a cross-section of the Martian frozen ground.
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NASA

The Martian Cryosphere

The drawing shows the depth at which water may be frozen into the ground. To have water running on the surface of Mars, this water region must be near to the surface. This may have happened at various times in the history of Mars as the climate warmed.

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The Transfer of Water in Martian History

On Mars, the water is trapped, frozen, within the ground. Nevertheless, there is evidence for running water on Mars. When the water is melted and released to the surface, it will run from higher ground...more

Mars Global Surveyor Measures Martian Surface Temperatures

This image shows how cold the surface of Mars can be. The temperature of the surface was measured by the Mars Global Surveyor spacecraft. The scale to the left shows that purple regions are the coldest,...more

Phoenix Mars Lander

NASA sent a new spacecraft to Mars. It is called the Phoenix Mars Lander. Phoenix landed near the North Pole of Mars. Scientists think there is ice buried under the ground there. Life on Earth needs water....more

Martian Volcanoes

On this map of Mars, the lightly cratered Tharsis Ridge is shown, as well as the heavily cratered Martian highlands (near the bottom of the picture), and Valles Marineris to the right. The volcanoes are...more

The Martian Cryosphere

The drawing shows the depth at which water may be frozen into the ground. To have water running on the surface of Mars, this water region must be near to the surface. This may have happened at various...more

Martian Floods

Separate from the Martian outflow channels, or the river valleys, are large Martian lakes (600 km, or ~1000 miles across) which once were part of a flood. ...more

Martian Fog

This picture shows fog on Mars. More fog has been seen in images returned by Mars Global Surveyor of the south polar region of Mars. Martian fog may have a little bit of acid mixed in with the water drops....more

Martian Orbital Eccentricity

The orbit of Mars is very oval shaped. The orbit is much more oval shaped than the Earth's orbit. This means that the climate of Mars can change drastically between warm and cold. ...more

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