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  1. Astronomy

    A comet continues to crumble

    Ever since astronomers first spied a comet 6 months ago and officially dubbed it C/2001 A2, the icy body has been breaking apart.

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  2. Astronomy

    A new giant in the Kuiper belt

    An icy body in the Kuiper belt, a reservoir of comets in the solar system beyond Neptune, is a record setter for the belt and bigger than Pluto's moon Charon.

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  3. Tests hint bird tails are misunderstood

    A test of starling's tails in a wind tunnel suggests that the standard practice of extrapolating bird tail aerodynamics from delta-wing aircraft may be a mistake.

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  4. Health & Medicine

    Radiation harms blood vessels before gut

    The side-effects of radiation therapy may result from initial damage to blood vessels.

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  5. Health & Medicine

    Sticky platelets boost blood clots

    Tests for genetic variations of a key protein on platelets, the cell-like blood components that form clots, and their propensity to clump could help physicians determine optimal medication for heart disease patients.

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  6. Sticky Situations

    Bacteria find strength in numbers as members of huge, mucous-covered communities called biofilms that can stall, equip, and initiate fierce infections.

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  7. Vitamin A calibrates a heart clock, 24-7

    Scientists have discovered a molecular clock that keeps the circulatory system in sync with the rest of the body, and they show it's regulated by vitamin A.

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  8. Materials Science

    Titanium dioxide hogs the spotlight

    Researchers have created new coatings that break down toxins and keep mirrors from fogging when the materials are exposed to visible light.

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  9. Earth

    New type of hydrothermal vent looms large

    The discovery of a new type of hydrothermal vent system on an undersea mountain in the Atlantic Ocean suggests that submarine hydrothermal activity may be much more widespread than previously thought.

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  10. 18959

    It may help to understand where that “missing antimatter” is if we just look around us. A proton has a positive charge–the sum of the quark polarities. If the (negative) electrical charge resident on the proton is in a reverse-time continuum, we would see it as positive. The mass remains the same. Hence, we have […]

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  11. Physics

    Antimatter mystery transcends new data

    The discovery of a disparity in decays of subatomic particles known as B mesons and anti-B mesons sheds light on how matter and antimatter differ but deepens the mystery of why matter predominates in the universe today.

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  12. Anthropology

    Earliest Ancestor Emerges in Africa

    Scientists have found 5.2- to 5.8-million-year-old fossils in Ethiopia that represent the earliest known members of the human evolutionary family.

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