What does discovery of liquid water on Mars actually mean?

Huge lake of salty water found buried deep in Mars

The team that wrote the study, including lead author Professor Roberto Orosei, have ruled out any other causes for the brightness. Data from NASA's Cassini orbiter, even though the mission ended in 2017, continues to provide researchers with evidence of organics under the ice of Saturn's moon Enceladus, although they can't yet tell if geology or biology produced those organics (Cassini simply wasn't equipped to tell the difference).

The detection was made using data collected between May 2012 and December 2015 by an instrument aboard the European Space Agency's Mars Express spacecraft that transmits radar pulses, which penetrate the Martian surface and ice caps.

The surface is mostly ice and dust for about 1.5 kilometers, but as the radar went deeper the scientists detected a layer that had a particularly bright reflection.

"There's nothing special about this location other than the MARSIS radar on the Mars Express spacecraft is most sensitive to that region", said Duffy.

A total of 29 sets of radar samplings showed a "very sharp change in its associated radar signal", allowing scientists to map the outlines of the lake.

Despite having a temperature between -103 and -3°C, the water remains liquid, possibly due to dissolved salts and the pressure of the 1.5km-deep ice sheet covering it.

ESA's press release on the discovery likens it to Lake Vostok, discovered 4 km underneath the ice in Antarctica, where certain forms of life thrive.

Our quest on Mars has been to 'follow the water, ' in our search for life in the universe, and now we have convincing science that validates what we've long suspected.

Australian experts have applauded the find, saying the discovery of liquid and frozen water resources is key due to their ability to produce fuel and provide life support for astronauts during deep space missions, allowing lower cost launches and space operations. Because it is salty, or briny, it remains in its liquid form and does not freeze.

Researchers have found evidence of an existing body of liquid water on Mars. They revealed the presence of liquid water.

It took years of patient analysis, but today a team of Italian scientists announced that an Italian-U.S. radar instrument, MARSIS-which has been observing Mars since 2005-finally found what it was looking for: a lake of liquid water a mile below the Martian surface near the planet's south pole.

Orosei said the lake's water was below freezing point but remained liquid thanks to a sizeable amount of salt. The presence of the underground lake was discovered by scientists at the Italian National Institute for Astrophysics (INAF), in Rome, DailyMail cited. But there hasn't been evidence of stable bodies of water until now, the researchers said.

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