Moroccan Meteorite May Be a 4.4-Billion-Year-Old Chunk of Martian Crust

Mars is often referred to as the Red Planet, but its signature color is only skin-deep. Beneath its rusty regolith, Mars has many other hues, including large dark regions formed by ancient lava flows. Now, researchers believe they may have found a pieceof Mars' dark plains here on Earth, in the form of a meteorite… »1/31/15 6:11pm1/31/15 6:11pm

What created such enormous craters on the Moon's nearside?

Earth's moon has been blasted by a lot of space rocks in its 4.5-billion-year history. While these impacts have left a near-uniform distribution of craters across our satellite's surface, planetary scientists have shown that one of its sides – the side that faces Earth – bears significantly larger scars than the… »11/07/13 3:58pm11/07/13 3:58pm

NASA's Curiosity Rover prepares to drill, baby, drill

Rovers, landers and satellites have been turning up evidence of a wet Martian history for years. Now, NASA's recently landed Curiosity rover has happened upon even more signs of the planet's watery past: veins of hydrated calcium sulfate (visible in the outrcrop pictured above) stretching across the planet's surface —… »1/16/13 11:20am1/16/13 11:20am

In (Partial) Defense of Overzealous Scientists: A Reflection on Martian Disappointments

Right before Thanksgiving, Curiosity project scientist John Grotzinger told NPR that NASA's rover had discovered something earthshaking on the Red Planet. "This data is going to be one for the history books," he crowed, declining to say more until results from the rover's SAM instrument — an onboard chemistry lab… »11/29/12 11:45am11/29/12 11:45am