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  1. Earth

    Lopsided lights

    Simultaneous snapshots reveal that northern and southern auroras aren’t always alike.

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  2. Health & Medicine

    Chimpanzees die from primate version of HIV

    A new study links the simian immunodeficiency virus to serious AIDS-like illness in a wild population.

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  3. Life

    Protein plays three cancer-fighting roles

    The tumor suppressor protein, p53, has three ways to protect cells from turning cancerous. A new study shows that p53 helps make microRNAs.

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  4. Life

    Sleeping ugly

    Analysis pinpoints genes that help springtails dehydrate and tough out the winter.

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  5. Space

    Jupiter takes it on the chin

    Images reveal that an object has recently bashed into Jupiter, 15 years after the first of 21 chunks of Comet Shoemaker-Levy 9 struck the giant planet and created a memorable display of dark spots, waves and plumes.

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  6. Life

    Web decorating with garbage

    Spider webs adorned with decaying food remains attract more attacks, but maybe there’s a defensive trade-off at work.

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  7. Health & Medicine

    Early testing for Alzheimer’s

    Spinal fluid test in people with mild cognitive impairments can predict in many cases who will develop the disease.

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  8. Paleontology

    Diggin’ dinos

    Structures found in Australian rocks may be the filled-in remains of the world’s oldest dinosaur burrows.

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  9. Physics

    Raindrops go it alone

    A new study using a high-speed camera finds the shattering of solitary drips can produce a variety of sizes.

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  10. When Humor Humiliates

    For gelotophobes, even good-natured laughter can sound a lot like ridicule.

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  11. The Biofuel Future

    Scientists seek ways to make green energy pay off.

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  12. Science Past from the issue of August 1, 1959

    Rename discomfort index — This summer you have a chance to “do something about,” not the weather, but the combination of heat and humidity that often makes so many persons so uncomfortable. The Weather Bureau in June started experimentally … publishing for the summer what it then called the “Discomfort Index.” The immediate results were […]

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