NASA's Mars Reconnaissance Orbiter has captured images of "mysterious shapes" inside huge craters.
Scientists are interested in the discovery because of the images captured by the HiRise camera. A fascinating glimpse into the planet's extensive and water-rich history could be seen from the dazzling patterns etched into the Martian surface.
Arabia Terra is a large and heavily eroded and cratered region north of the equator.
The craters in this region did not show the remains of these deposits. They only showed up in craters that measure 2,000 feet across and larger than the smaller ones.
He wrote that the deposits may be layers or terraces. There are small bright ridges in the deposits.
The features are thought to be caused by ice-rich material turning from a solid into a gas, with each terrace representing a different stage in this process.
The ice that has seeped into the planet's arid surface over billions of years is believed to have come from once teeming with water.
The larger craters may have penetrated to a water table between 146 and 199 feet below the surface.
All sorts of fascinating landscapes are forming because of the disappearance of Martian ice.
The Happy Face crater is believed to have been formed by sublimating frost over a long period of time.
While we can't say for sure what's behind these latest mysterious observations, they provide another fascinating glimpse into the kind of discoveries NASA's Orbiter still can afford.
There are mysterious shapes inside the Mars crater.
The meteorite hit Mars so hard that NASA thought it was a big earthquake.
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