Pythons' huge meals strengthen their hearts, and scientists hope it will help them learn how to treat human heart diseases.

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Adrian Beltre of the Texas Rangers is hit by a pitch from the Tampa Bay Rays' James Shields on Oct. 1 at Rangers Ballpark in Arlington, Texas.

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The Stratospheric Observatory for Infrared Astronomy, known as SOFIA, is a modified Boeing 747 airplane that houses a NASA telescope. Melissa Forsyth/NPR hide caption

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NASA's GRAIL mission to study the moon launches aboard a Delta II rocket at Kennedy Space Center on Sept. 10. Sandra Joseph and Don Kight/NASA hide caption

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A Swainson's thrush flies a mock-migration in the wind tunnel at the University of Western Ontario. Science/AAAS hide caption

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Thirsty Birds 'Burn The Engine' In Flight

Migrating birds fly hundreds of miles at a time with no break. A new study shows that they may be staying hydrated by burning up their own muscles and organs.

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Does getting home from your vacation spot always seem to take less time than getting there? A new scientific study provides an explanation for why. Harold M. Lambert/Lambert/Getty Images hide caption

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Researchers hope to keep the mosquito that transmits dengue, Aedes aegypti, from infecting humans using the Wolbachia bacterium. James Gathany/CDC Public Health Image Library hide caption

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Scientists now know why coffee rings have dark, well-defined edges, as seen in the image above. The research finding may have implications on the development of inks and paints. Marina Dominguez/NPR hide caption

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