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6 March 2014 1:04 pm ,
Vol. 343 ,
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...
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...
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ScienceShot: Pac-Man Gobbles the Death Star
30 March 2010 10:47 am
The Cassini spacecraft must have known April Fool's Day was coming up. It returned this temperature map—released yesterday—after its closest flyby ever of Saturn's icy moon Mimas last month. Shaped into the likes of the Death Star of Star Wars fame by the giant crater Herschel, 396-kilometer-diameter Mimas was expected to have its warmest surface temperatures on the equator, where it was early afternoon. Instead, it was warmest in the morning (all of 92 K), giving rise in the science team's temperature-calibrated color scheme to a very large Pac-Man. The warmer Herschel in Pac-Man's mouth makes sense, Cassini scientists say, because the crater could retain heat longer, but the gaping Pac-Man is a mystery. Perhaps it arises from a variation in the heat retention properties of surface ice. Now, on to Cassini's 67th flyby of Saturn's big haze-shrouded moon Titan on 5 April.