Reviews & Analysis

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  • A nanoscale imaging method that uses ultrashort light pulses to initiate and follow the motion of a single molecule adsorbed on a solid surface opens a window onto the physical and chemical dynamics of molecules on surfaces. See Letter p.263

    • Nicholas Camillone III
    News & Views
  • Observations of a real-time invasion of Australia by Asian honeybees demonstrate how natural selection can allow a small founding population to overcome the genetic odds stacked against success.

    • Amro Zayed
    News & Views
  • Injured blood vessels are repaired by vascular smooth-muscle cells. It emerges that the protein Fat1 regulates the proliferation of these cells by inhibiting the function of mitochondria. See Letter p.575

    • Charles E. de Bock
    • Rick F. Thorne
    News & Views
  • In many mammals, the gene Ostn is expressed in muscles and bones. The discovery that the primate OSTN gene has been repurposed to also act in neurons provides clues to how humans evolved their cognitive abilities. See Article p.242

    • Justine Kupferman
    • Franck Polleux
    News & Views
  • Random lasers use disordered structures to produce light, which is usually emitted in many directions. A random laser that can produce a collimated beam offers a wide range of applications, from imaging to security scanning.

    • Diederik S. Wiersma
    News & Views
  • The discovery of a cascade of sound waves across many wavelengths in an ultracold atomic gas advances our understanding of turbulence in fluids governed by quantum mechanics. See Letter p.72

    • Brian P. Anderson
    News & Views
  • Physicists are hunting for a particle called the axion that could solve two major puzzles in fundamental physics. An ambitious study calculates the expected mass of this particle, which might reshape the experimental searches. See Letter p.69 See Clarification p.176

    • Maria Paola Lombardo
    News & Views
  • A previously unknown way in which cells mark proteins for destruction has been found in bacteria — phosphorylation of the amino acid arginine targets proteins for degradation by protease enzymes. See Article p.48

    • Arti Tripathi
    • Susan Gottesman
    News & Views
  • Sleep in mammals consists of non-rapid-eye-movement and rapid-eye-movement sleep. A large genetic screen reveals that these two sleep states are altered in mice by mutations dubbed Sleepy and Dreamless. See Article p.378

    • Derk-Jan Dijk
    • Raphaëlle Winsky-Sommerer
    News & Views
  • Binary and multiple star systems result from the fragmentation of dense material in young molecular clouds. Observations reveal that this can occur on small scales, supporting a previous model of star formation. See Letter p.483

    • Adele Plunkett
    News & Views
  • Expression of a blood-cancer-associated genetic mutation in the non-blood cells of the bone marrow is sufficient to cause blood cancer in mice. This finding could point to new approaches to treating an often-fatal disease. See Letter p.304

    • Gordon Chan
    • Benjamin G. Neel
    News & Views
  • Hsp70 chaperone molecules help other proteins to fold, and were thought to bind mainly to unfolded proteins. Single-molecule experiments now suggest that Hsp70s can also stabilize almost fully folded proteins. See Letter p.448

    • Qinglian Liu
    • Elizabeth A. Craig
    News & Views
  • The sounds of words that represent particular meanings are usually thought to vary arbitrarily across languages. However, a large-scale study of languages finds that some associations between sound and meaning are widespread.

    • W. Tecumseh Fitch
    News & Views