- News Home
17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
- About Us
ScienceShot: Rover Takes a Deep Look Into Mars
10 August 2011 2:15 pm
Yesterday, after a 3-year, 21-kilometer journey at top speeds of less than 0.2 kilometer per hour, the Opportunity rover finally arrived at Mars's Endeavour crater. The intrepid explorer had already poked into 11 craters, the largest 750-meter-wide, 70-meter-deep Victoria, and analyzed rocks and soil along 33 kilometers of track. But the geologic story it read there always spoke of an ancient martian wasteland of windblown dunes pocked by the occasional acid-laced puddle. Now that it has arrived at 22-kilometer-wide, 300-meter-deep Endeavour, Opportunity may be on the brink of rock from earlier, more hospitable times in martian history. NASA's Mars Reconnaissance Orbiter has detected clay in rock of the crater rim exposed by the far larger impact explosion that created Endeavour. And the presence of clay tells geologists that water altered the rock under far milder, presumably more habitable conditions than those that produced the rock Opportunity or any other rover has analyzed to date. NASA's $2.5 billion Curiosity rover scheduled to launch this November, if successful, will not likely reach its clay-bearing target in Gale crater until 2013.
See more ScienceShots.