And not just tiny bits, but LARGE amounts of it!
<< Observation of large amounts of ice on Mars
Basis of observation:
The evidence for large amounts of ice in the southern hemisphere of Mars comes from three different instruments in the Gamma-Ray Spectrometer (GRS) instrument suite on board the 2001 Mars Odyssey spacecraft: the Gamma Ray Sensor, the Neutron Spectrometer (NS), and the High-Energy Neutron Detector (HEND). Each of these instruments has detected the signal expected from a large amount of ice in the surface, or regolith, of Mars. The presence of ice is indicated by signals due to hydrogen, one of the major constituents of water, which has the chemical formula H2O. This formula signifies that water is made up of two atoms of hydrogen combined with one atom of oxygen. We determine the amount of hydrogen in the soil by two different techniques. One relies on the ability of hydrogen to slow down, or moderate, neutrons and the other relies on the fact that hydrogen can absorb a neutron and then emit a gamma ray of a specific and characteristic energy. We have seen both of these effects in the initial data from the Mars Odyssey GRS. >>
Source
<< Observation of large amounts of ice on Mars
Basis of observation:
The evidence for large amounts of ice in the southern hemisphere of Mars comes from three different instruments in the Gamma-Ray Spectrometer (GRS) instrument suite on board the 2001 Mars Odyssey spacecraft: the Gamma Ray Sensor, the Neutron Spectrometer (NS), and the High-Energy Neutron Detector (HEND). Each of these instruments has detected the signal expected from a large amount of ice in the surface, or regolith, of Mars. The presence of ice is indicated by signals due to hydrogen, one of the major constituents of water, which has the chemical formula H2O. This formula signifies that water is made up of two atoms of hydrogen combined with one atom of oxygen. We determine the amount of hydrogen in the soil by two different techniques. One relies on the ability of hydrogen to slow down, or moderate, neutrons and the other relies on the fact that hydrogen can absorb a neutron and then emit a gamma ray of a specific and characteristic energy. We have seen both of these effects in the initial data from the Mars Odyssey GRS. >>
Source
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