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The Climate Jump Heard 'Round The World

Scientists know that the unusual and rapid temperature jump of the Younger Dryas was felt over half the globe. But they're only now beginning to understand why.


Interactive: Watch a Glacier Melt

Qori Kalis is the largest outlet glacier of Peru's Quelccaya ice cap. See firsthand how it (like all tropical glacier ice) is melting because of global warming.


Diabetes in a Dish: Using Stem Cells to Study Disease

While technological advances are making it easier for the 21 million diabetics in the United States to manage healthy lives, diabetes is still a disease that requires vigilance. See how scientists are using stem cells to find a cure.



A Tale of Two Rovers

In early 2004, two unlikely explorers traveled to the red planet and found strong evidence to confirm water once existed on the surface of Mars, and in sufficient quantity to possibly have harbored life.



Why Go to Mars

So much of what drives cosmic exploration involves the quest to learn whether or not we're alone in the Universe. But that's not the only reason to go to Mars. Find out others from Neil deGrasse Tyson.


Visions (and Revisions) of Mars

The invention of the telescope in the 17th century provided scientists with unprecedented, yet hazy, images of Mars. Some observers saw canals; others saw diagrams drawn for "interplanetary communication."



When Worlds Diverge

For all their similarities, Mars possesses unique geophysical traits — traits that early on set Mars on a developmental path distinct from Earth's.



Is the Signature Still Wet?

A series of satellite photographs taken by NASA's Mars Global Surveyor, which has been mapping Mars since 1999, raise the exciting possibility that liquid water may have existed there very recently.



Article: First Planet Finishes Last

Mercury is the most unusual of the four planets closest to the Sun. It’s also the most neglected. Until MESSENGER, it was the only one of the four that hadn’t been comprehensively imaged.


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