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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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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The Juno spacecraft, seen above Jupiter in this artist's rendering. Juno's primary mission is to improve our understanding of Jupiter's formation and evolution. NASA/JPL-Caltech hide caption

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Vampire bats have the ability to detect heat in their surroundings. This enables them to home in on animals that have blood vessels near the surface of their bodies. This vampire bat was caught in a net for a research study in Para, Brazil, in 2005. Mario Quadros/AP hide caption

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