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Bacteria Harbor Secret Weapons Against Antibiotics

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The ability of pathogenic bacteria to evolve resistance to antibiotic drugs poses a growing threat to human health worldwide. And scientists have now discovered that some of our microscopic enemies may be even craftier than we suspected, using hidden genetic changes to promote rapid evolution under stress and developing antibiotic resistance in more ways than previously thought. The results appear in a new paper in the journal Biomicrofluidics, from AIP Publishing.

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NASA Hubble Space Telescope, Whirlpool Galaxy, Advanced Camera For Surveys, Near Infrared Camera and Multi-Object Spectrometer, American Astronomical Society Meeting, Seattle, Washington

The Two-Faced Whirlpool Galaxy

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These images by NASA's Hubble Space Telescope show off two dramatically different face-on views of the spiral galaxy M51, dubbed the Whirlpool Galaxy. The images will be presented on Jan. 13, 2011, at the American Astronomical Society meeting in Seattle, Wash.

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Ecology, Birdsong, Animal Behavior, Sexual Behavior

Australian Birds Attract Mates with "Scary Movie Effect"

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Male splendid fairy-wrens, a sexually promiscuous small bird native to Australia, are known to sing a special song each time they hear the call of one of their predators, the butcherbirds. New research from the University of Chicago finds that this seemingly dangerous behavior actually serves as a call to potential mates – a flirtation using fear.

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Celebrating 100 Years of National Parks in Canada

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Canada's national parks have seen many changes in the 100 years they have been around. Our national parks and Canadians' connections to them have helped shaped Canada's national identity.


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