A high-resolution camera mounted on NASA's Mars Reconnaissance Orbiter has snapped pictures of unusual, almost perfectly circular sand dunes on the Red Planet's surface. When you purchase through ...

The sand dunes were imaged as part of a program to ... It comes as part of a series of pictures taken by the HiRise camera that orbits Mars on the Mars Reconnaissance Orbiter (MRO) spacecraft.

If a beach getaway is included in your holiday break plans, be mindful of snakes that may also inhabit the shores. "Rattlesnakes are one of many common critters found in the sand dunes on Texas ...