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10 April 2014 11:44 am ,
Vol. 344 ,
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
- 10 April 2014 11:44 am , Vol. 344 , #6180
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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.