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  • News

    Dawn spacecraft arrives at dwarf planet Ceres

    The Dawn spacecraft has arrived at the dwarf planet Ceres.After 7½ years trekking across the solar system — including a stopover at the asteroid Vesta — Dawn pulled up alongside Ceres March 6 and let the dwarf planet’s gravity take over, pulling the probe in for a closer look. In six more weeks, Dawn will be close enough to Ceres to begin its 14-month...
    03/06/2015 - 09:47 Planetary Science
  • News

    Light trick can retrieve missed messages

    SAN ANTONIO — Light may travel at the speed of light, but the information it carries doesn’t have to. Three physicists have proposed a way to receive light-based messages even when the light itself has already flown by.The communication technique, detailed March 2 at the March meeting of the American Physical Society and in...
    03/05/2015 - 15:18 Quantum Physics
  • News

    Supernova hurls star out of the galaxy

    Some stars are in a rush to get out of the galaxy. One such star is hurtling away from the Milky Way at roughly 4.3 million kilometers per hour, researchers report in the March 6 Science, making it the fastest-moving star to be ejected from our galaxy.The escapee, designated US 708, might have been propelled by a...
    03/05/2015 - 14:00 Astronomy
  • Science Ticker

    Hubble telescope sees quadruple

    The Hubble Space Telescope is seeing quadruple. Four images of the same supernova flashed in the constellation Leo as its light bent around a galaxy sitting about 6 billion light-years away between Hubble and the exploding star, researchers report in the March 6 Science.The light from the supernova, nicknamed...
    03/05/2015 - 14:00 Astronomy, Cosmology
  • Science Ticker

    Dawn spacecraft on final approach to Ceres

    The finish line is in sight for the Dawn mission. After 7 1/2 years in space, including a 14-month stop at the asteroid Vesta, the spacecraft is about to pull up alongside the dwarf planet Ceres.Around 7:20 a.m. Eastern time on March 6, Ceres’ gravity will take hold and start to pull the spacecraft in. The probe...
    03/05/2015 - 13:30 Planetary Science
  • News

    Killer whales follow postmenopausal leaders

    A clue to the evolution of menopause may come from older female killer whales who often take the lead in salmon hunts.Among the whales that feast on chinook along the coast of the Pacific Northwest, females past reproductive age often lead hunting parties, especially in fish-sparse years, says Lauren Brent of the University of Exeter in England.Male killer whales rarely live longer than 50 years...
    03/05/2015 - 12:00 Animals, Evolution
  • Science Ticker

    Arsenic spurs adaptation in Argentinian villagers

    The groundwater in San Antonio de los Cobres in northwestern Argentina averages around 200 micrograms of arsenic per liter, 20 times the level deemed acceptable by the World Health Organization. A genetic analysis reveals that people from this region have different genes for the liver enzyme that breaks down arsenic than do people...
    03/05/2015 - 08:00 Health, Evolution
  • News

    Hepatitis E vaccine shows strong coverage

    A vaccine against hepatitis E shows potent, long-lasting protection against the virus. The finding from a huge study in China could clear the way for other countries to adopt the shots against hepatitis E, which is most commonly spread through tainted water.“I consider this to be extremely important for the field,” says Heiner Wedemeyer, a physician and hepatitis researcher at Hanover Medical...
    03/04/2015 - 17:00 Clinical Trials, Health, Biomedicine
  • Scicurious

    Report offers stimulating recommendation on coffee

    A new round of dietary do’s and don’ts accompanied last month’s scientific report on the latest food research, summarizing everything from aspartame to saturated fats. The report puts eggs back on the menu. High dietary cholesterol is no longer linked to blood...
    03/04/2015 - 15:13 Nutrition
  • News in Brief

    Dose of extra oxygen revs up cancer-fighting immune cells

    Boosting oxygen in the air helped mice with cancer battle lung and breast tumors.Normal air contains 21 percent oxygen. Raising oxygen concentrations to 60 percent energized immune cells to shrink tumors in mice, researchers report in the March 4 Science Translational Medicine. About 40 percent of cancer-...
    03/04/2015 - 14:00 Cancer, Immune Science, Biomedicine