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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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ScienceShot: Mars Rover Finds Watery Wonderland
15 January 2013 5:50 pm
The Curiosity rover has entered a martian terrain offering clear signs of ancient water and tantalizing hints of a scientific bonanza. In a press teleconference today, NASA rover team members reported the discovery of mineral-filled veins (white arrows) and small mineral spheres (black arrows) that require that water once saturated the muddy floor of Gale crater. But geologists are particularly enticed by the sedimentary rock that Curiosity has roved across on its way from its landing site. As it descended deeper into the exposed strata and farther back in geologic time, it first encountered pebbles and cobbles laid down in deep torrents of water, then sandy sediments deposited by less turbulent currents, and finally fine, silty sediments. The silty sediments speak of a far quieter time in Gale, perhaps when a placid lake filled the crater. Lake sediments are the ideal place to look for organic matter lingering from ancient martian life, which is what Curiosity will do when it begins rock drilling in a few weeks.
See more ScienceShots.