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  • News

    Heat turns wild genetic male reptiles into functional females

    Some genetically male Australian bearded dragons are growing up as fully functional females in the wild — the first reptiles confirmed to reverse sex under natural conditions.

    Eleven of 131 Pogona vitticeps lizards caught at several sites in southeastern Australia during three years had female sex organs but the male ZZ set of sex chromosomes, says Clare Holleley of the...

    07/01/2015 - 13:03 Animals, Evolution, Physiology
  • Editor's Note

    E-cigarette reports provide science that society craves

    For much of the last year, the most-read story on sciencenews.org was not about a faraway exoplanet or a cunning creature’s adaptations to an exotic locale. It was a short report, in some ways unsurprising. In 26 different weeks since it appeared in June 2014,...

    07/01/2015 - 09:14 Health, Technology, Cancer
  • Letters to the Editor

    Puzzling cosmic signals, processed food defined and more reader feedback

    To edit or not

    A controversial paper about modifying genes in fertilized human eggs raised some serious ethical concerns. Tina Hesman Saey covered researchers’ arguments for and against this type of...

    07/01/2015 - 09:14 Cells, Nutrition, Astronomy
  • July 11, 2015

    07/01/2015 - 09:13
  • Science Visualized

    A loopy look at sunspots

    Tangled nests of magnetic fields burst from sunspots on the solar surface. The spots appear blue and yellow in this false color composite photograph, which was taken in October by NASA’s Solar Dynamics Observatory and released in May. The pale streaks trace magnetic field lines, which stretch up to 200,000 kilometers above the surface (black).

    In visible light, sunspots look like dark...

    07/01/2015 - 06:00 Astronomy
  • Wild Things

    Pink salmon threatened by freshwater acidification

    As carbon dioxide levels in the atmosphere rise, the world’s oceans are absorbing some of the gas and slowly becoming more acidic. That acidification impedes the chemical reaction that many marine species use to make calcium carbonate shells and skeletons. Fish were once thought to be immune to the drop in pH, but...

    06/30/2015 - 18:00 Climate, Animals
  • Science Ticker

    Clot-snatching stroke treatment gets the green light

    Doctors may soon use a small device to snatch blood clots from the brain. On June 29, the American Heart Association and the American Stroke Association issued guidelines recommending the use of the treatment in...

    06/30/2015 - 16:42 Health
  • Science Ticker

    Old fruit flies’ swagger restored with brain chemical dopamine

    The chemical messenger dopamine can bring back that loving feeling for old fruit flies. By carefully boosting dopamine levels in a handful of specific brain cells, scientists coaxed male flies past their prime into wooing females more vigorously.

    Tsai-Feng Fu of National Chi Nan University in Nantou, Taiwan, and colleagues engineered male fruit flies, Drosophila melanogaster, so...

    06/30/2015 - 14:34 Neuroscience
  • News in Brief

    Genetic tweak turned plague bacterium deadly

    Two genetic changes turned the plague into a scourge.  

    The ancestor of the plague-causing bacterium Yersinia pestis causes mild stomach disease. Early in its evolution, Y. pestis acquired a single gene from other bacteria that allowed it to cause the deadly lung infections of pneumonic plague, scientists ...

    06/30/2015 - 11:00 Health, Genetics, Evolution
  • Feature

    E-cigarettes proving to be a danger to teens

    They’ve appeared on television and in magazines — Katy Perry, Johnny Depp and other celebrities vaping electronic cigarettes. The high-tech gadgets, marketed as a healthier alternative to traditional cigarettes, seem to be available everywhere, from Internet suppliers and specialty vaping shops to 24-hour convenience marts.

    E-cigarettes have become the fashionable new electronic toy....

    06/30/2015 - 09:00 Health