Volume 566 Issue 7743, 14 February 2019

Space and CHIME

This issue presents the first observations to come from the Canadian Hydrogen Intensity Mapping Experiment (CHIME), a radio telescope located near Penticton in British Columbia. The data were collected while the new instrument was being tested in July and August last year. In the first of two papers, the CHIME/FRB Collaboration reports the observation of 13 fast radio bursts, which were detected at frequencies as low as 400 megahertz. Fast radio bursts are emissions that last about a millisecond and originate far outside the Milky Way, although their emission mechanism is uncertain. Despite substantial searches, such bursts have not previously been detected below 700 MHz. In the companion paper, the collaboration reveals that the source of one of the bursts is actually a repeating fast radio burst, only the second such source to be detected. The researchers suggest this early detection indicates that CHIME is likely to observe a lot more repeating fast radio bursts over its lifetime.

Cover image: Andrew Fyfe

This Week

News in Focus





    News & Views

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    It is well established that solid objects can be cooled by harnessing the properties of laser light. A laser-free technique that attains such cooling by tuning thermal radiation could have many practical applications.

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    Infection by Ebola virus can be fatal. The discovery of a human protein that mimics one type of Ebola protein and binds to another to suppress viral RNA production might aid the development of clinical treatments for the disease.

    • Seiya Yamayoshi
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    Nitrogen gas dissolved in the ocean must be fixed — converted into more-reactive compounds — before it can be used to support life, but the regions in which this nitrogen fixation occurs have been elusive. Not any more.

    • Nicolas Gruber
  • News & Views |

    How Nature reported a key step towards test-tube babies in 1969, and strange damage to a German shell in 1919.

  • News & Views |

    A system has been devised that computationally screens hundreds of millions of drug candidates — all of which can be made on demand — against biological targets. This could help to make drug discovery more efficient.

    • David E. Gloriam
  • Perspectives

  • Articles

  • Article |

    Convergent estimates of nitrogen fixation from an inverse biogeochemical and a prognostic ocean model show that biological carbon export in the ocean is higher than expected and that stabilizing nitrogen-cycle feedbacks are weaker than we thought.

    • Wei-Lei Wang
    • , J. Keith Moore
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  • Article |

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  • Letters

  • Letter |

    A second repeating fast radio burst is detected, showing behaviour similar to that of the first, and demonstrating that repeaters are unlikely to be rare.

    • M. Amiri
    • , K. Bandura
    •  & P. Yadav
  • Letter |

    Sporadic inactivation of the interleukin-22 receptor in the intestinal epithelium of the mouse shows that IL-22 is required for effective activation of the DNA damage response following DNA damage.

    • Konrad Gronke
    • , Pedro P. Hernández
    •  & Andreas Diefenbach
  • Letter |

    Phosphorylation of one of two adjacent serine residues in TSC2 is both required and sufficient for PKG1-mediated cardiac protection against pressure overload in mice; these serine residues provide a genetic tool for the bidirectional regulation of stress-stimulated mTORC1 activity.

    • Mark J. Ranek
    • , Kristen M. Kokkonen-Simon
    •  & David A. Kass
  • Letter |

    The Forkhead transcription factors FOXK1 and FOXK2, which are induced by starvation, reprogram cellular metabolism to induce aerobic glycolysis.

    • Valentina Sukonina
    • , Haixia Ma
    •  & Sven Enerbäck

Amendments & Corrections

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