今週号

Volume 541 Number 7636 pp133-252

12 January 2017

表紙について

An aerial view of the river Amazon, taken from the International Space Station, on 6 April 2016. The Amazon forest both responds to and drives much of the variability in climate and biogeochemistry from annual to millennial time scales. But highly resolved records of past climate variability in the region are hard to come by, and until now it has not been clear even whether the Amazon forest was wetter or drier during the Last Glacial Maximum (LGM). Xianfeng Wang et al. have now collected oxygen isotope data covering the past 45,000 years from stalagmite calcite deposits in the Paraテュso Cave in eastern Amazonia. Their data show that rainfall was about half that of today during the LGM (around 21,000 years ago) but was some 50% greater during the mid-Holocene (6,000 years ago), broadly coinciding with global changes in temperature and carbon dioxide. Although the Amazon was drier during the glacial period, the rainforest persisted throughout. Whether or not it can be sustained in the future, however, remains an open question. Cover: Tim Peake/ESA/NASA/Getty Images

This Week

Editorials

Top

World View

Top
  • Where science and nonsense collide

    After a decade of progress, Argentina’s scientists are battling a government bent on twisting public conceptions of their role, writes Alberto Kornblihtt.

Seven Days

Top
  • SEVEN DAYS

    The week in science: 6–12 January 2017

    News in Focus

    Feature

    Top

    comment

    Books and Arts

    Top
    • Chemistry: The hidden war

      Paul A. Lombardo applauds a shocking study detailing the Allies' Second World War experimentation with chemical weapons on their own troops.

      • Review of Toxic Exposures: Mustard Gas and the Health Consequences of World War II in the United States
        Susan L. Smith
    • Books in brief

      Barbara Kiser reviews five of the week's best science picks.

    • Neuroscience: The risks of reading the brain

      Russell Poldrack assesses a primer on the implications of advances in brain imaging.

      • Review of Sex, Lies, and Brain Scans: How fMRI Reveals What Really Goes on in our Minds
        Barbara J. Sahakian & Julia Gottwald

    Correspondence

    Top

    Careers

    Features

    Top

    Q&As

    Top

    naturejobs job listings and advertising features

    Futures

    research

    Articles

    Top

    Letters

    Top