'Significant' Amounts of Water , Found Under Mars' Surface , in Historic Discovery.br ‘Newsweek’ reports that the ExoMars Trace Gas Orbiter (TGO), a collaboration between the European Space Agency (ESA) and the Russian Roscosmos agency,br has discovered "significant amounts" of water on Mars. .br In a December 15 announcement, the ESA br said that water was found hidden under the br surface of Mars' Valles Marineris canyon system. .br The area is reportedly ten times the length br and five times the depth of the Grand Canyon. .br (The Fine Resolution Epithermal Neutron br Detector neutron telescope) revealed br an area with an unusually large br amount of hydrogen in the colossal br Valles Marineris canyon system:, Igor Mitrofanov of the Space Research Institute of the Russian Academy of Sciences, via 'Newsweek'.br ... assuming the hydrogen we see is bound br into water molecules, as much as 40 br of the near-surface material in this br region appears to be water, Igor Mitrofanov of the Space Research Institute of the Russian Academy of Sciences, via 'Newsweek'.br According to the ESA, while water was previously discovered on Mars, most of it was found in the planet's frozen polar regions as ice. .br The recent finding reportedly signifies br that the planet may contain larger br water deposits covered by dust. .br With TGO we can look down to one meter below this dusty layer and see what's really going on below Mars' surface—and, crucially, locate water-rich 'oases' that couldn't be detected with previous instruments, Igor Mitrofanov of the Space Research Institute of the Russian Academy of Sciences, via 'Newsweek'.br Knowing more about how and where water exists on present-day Mars is essential to understand what happened to Mars' once-abundant water, .., Colin Wilson, ESA's ExoMars Trace Gas Orbiter br project scientist, via 'Newsweek'.br ...