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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
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ScienceShot: Jelly Doughnut on Mars Mystery Solved!
14 February 2014 4:30 pm
No one had ever seen anything like it in the quarter-century of exploration on the surface of Mars. It appeared in front of the Opportunity rover as if it had fallen from the sky, and its resemblance to a jelly-filled doughnut stoked the media’s interest all the more. But the show’s over, folks. NASA announced today that, once Opportunity turned to get a clear view of where it had roved from, it was obvious—as mission scientists had speculated—that a rover wheel had rolled over a rock (center), broken off a bit of it, and sent the chip downhill to where it was seen days later. The dark red “filling” could have formed geologically recently after erosion exposed the rock at the surface, scientists said, or it could have formed long ago deep within Mars. End of story. On to the next rock.