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Mars Curiosity High Resolution Photos

Mars rover beams back high-resolution photos, The Mars Curiosity rover has transmitted its first high-resolution pictures from the Red Planet. The rover also transmitted the first human voice from another planet.

Nasa is showing off a high-resolution colour picture sent back by the Mars rover Curiosity, detailing the mountain where scientists plan to focus their search for the chemical ingredients of life.

The image reveals distinct tiers near the base of the three-mile-high mountain that rises from the floor of Gale Crater, where Curiosity landed on 6 August.

Scientists estimate it will be a year before the rover reaches the layers of interest at the foot of the mountain, 6.2 miles from the landing site.

From earlier orbital imagery, the layers appear to contain clays and other hydrated minerals that form in the presence of water, Nasa has said.

Previous missions to Mars have uncovered strong evidence for vast amounts of water flowing over its surface in the past. Curiosity was dispatched to hunt for organic materials and other chemistry considered necessary for life to evolve.

In this picture, the layers above where scientists expect to find hydrated minerals show sharp tilts, offering a strong hint of dramatic changes in Gale Crater, which is located in the planet's southern hemisphere near its equator.

Mount Sharp, the name given to the towering formation at the centre of the crater, is believed to be the remains of sediment that once completely filled the 96-mile-wide basin.

"This is a spectacular feature that we're seeing very early," said John Grotzinger, a project scientist with the California Institute of Technology. "We can sense that there is a big change on Mount Sharp."

The higher layers are steeply slanted relative to the layers of underlying rock, the reverse of similar features found in the Grand Canyon.

"The layers are tilted in the Grand Canyon due to plate tectonics, so it's typical to see older layers be more deformed and more rotated than the ones above them," Grotzinger said. "In this case you have flat-line layers on Mars overlaid by tilted layers. The science team, of course, is deliberating over what this means.

"This thing just kind of jumped out at us as being something very different from what we ever expected."

Take out plate tectonics and the most likely explanation for the angled layers has to do with the physical manner in which they were built up, such as being deposited by wind or by water. "On Earth there's a whole host of mechanisms that can generate inclined strata," Grotzinger said. "Probably we're going to have to drive up there to see what those strata are made of."

Also on Monday, Nasa said it used the rover to broadcast a message of congratulations to the Curiosity team from the Nasa chief, Charles Bolden, a demonstration of the high bandwidth available through a pair of US science satellites orbiting Mars.

"This is the first time that we've had a human voice transmitted back from another planet" beyond the moon, said Chad Edwards, chief telecommunications engineer for Nasa's Mars missions at the Jet Propulsion Laboratory in Pasadena, California.

"We aren't quite yet at the point where we actually have a human present on the surface of Mars ... it is a small step."

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