Much of the evidence for water on Mars in the present is
circumstantial and inferential, but scientists appear confident that
the evidence does indicate that water exists in the forms of water
vapor, ice, and possibly subsurface aquifers.
A search of the NASA Home Page
for Mars water
Yields over 500 results
Mars Present Missions
"Among key science findings so far, Global Surveyor has taken pictures
of gullies and debris flow features that suggest there may be current
sources of liquid water, similar to an aquifer, at or near the surface
of the planet. Magnetometer readings show that the planet's magnetic
field is not globally generated in the planet's core, but is
localized in particular areas of the crust. New temperature data and
closeup images of the Martian moon Phobos show its surface is composed
of powdery material at least 1 meter (3 feet) thick, caused by
millions of years of meteoroid impacts. Data from the spacecraft's
laser altimeter have given scientists their first 3-D views of Mars'
north polar ice cap."
A search of The Jet Propulsion Laboratory (JPL) Mars site:
Yields 352 results
Follow the Water
The Case of the Missing Mars Water
Dark spots and streaks on defrosting sand dunes were first observed by
MOC in the northern hemisphere in 1998. Similar dark-spotted dunes in
the southern hemisphere were described at a NASA/Mars Global Surveyor
Space Science Update media briefing in 1999. Despite the "sensation"
one gets when looking at pictures of spotted, defrosting martian
dunes (i.e., the sensation that these images show some form of life,
like vegetation, growing on Mars) these features are a normal, common
manifestation of the springtime defrosting process on Mars. The ices
involved--because of the low temperatures at these locations--are
probably both frozen water and carbon dioxide, though it is unclear as
to whether one type of ice dominates over the other in controlling the
appearance and coalescence of the dark spots. It is known from the
first martian year of MOC operations that by summer all of the
frost--and thus all of the spots--on the dunes will be gone.
See also the gallery of water feature images.
Other results also give plans for future exploration.
No search strategy. Simply use the NASA sites' search functions.