© ESA, C. CarreauThe Mars Express spacecraft's MARSIS collects data on the subsurface of Mars.
A European spacecraft orbiting Mars has found more revealing evidence that an ocean may have covered parts of the Red Planet billions of years ago.
The European Space Agency's
Mars Express spacecraft detected sediments on Mars' northern plains that are reminiscent of an ocean floor, in a region that has also previously been identified as the site of ancient Martian shorelines, the researchers said.
"We interpret these as sedimentary deposits, maybe ice-rich," study leader Jérémie Mouginot, of the Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) in France and the University of California, Irvine, said in a statement. "It is a strong new indication that there was once an ocean here."
As part of its mission,
Mars Express uses a radar instrument, called MARSIS, to probe beneath the Martian surface and search for liquid and solid water in the upper portions of the planet's crust.
The researchers analyzed more than two years of MARSIS data and found that the northern plains of Mars are covered in low-density material that suggests the region may have been an ancient Martian ocean.
Comment: Bad science. Where is the evidence for global warming? For example see: Forget Global Warming - It's Cycle 25 We Need to Worry About where we read: For a species that is "between 12,000 and 200,000 years old" it seems to have survived many shifts in climate just fine. What won't survive the next shift in climate are studies linked to 'man made global warming'.