European Space Agency, Mars Express discovers "water minerals"

The ESA's Mars Express

and NASA's Mars Reconnaissance Orbiter have discovered hydrated silicate minerals in the northern lowlands of Mars,

a clear indication that water once flowed there, the ESA said.

No such sites had been found in the northern lowlands until

this week, the ESA said. The results could also suggest sites for future Mars landers, because evidence of water during the planet's early history suggests conditions in those spots may have been favorable to the evolution of primitive life, the ESA said.

source:edition.cnn.com