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Volume 422 Issue 6933, 17 April 2003

Volume 422 Issue 6933

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Editorial

  • Fears about the safety of reproductive technologies should be kept in perspective, but more research is needed to assess the risks. In the meantime, its practitioners should learn the virtue of caution.

    Editorial

    Advertisement

  • Spy scandals notwithstanding, the party goes on at the two US nuclear-weapons design labs — and so does the backbiting.

    Editorial
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News

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News in Brief

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News Feature

  • Questions are now being asked about the safety of some of the techniques used to overcome human infertility. Kendall Powell examines whether the health of test-tube babies is at risk.

    • Kendall Powell
    News Feature

  • Our knowledge of planets outside our Solar System has been transformed in the past few years. But these new-found worlds don't look much like our planetary neighbours, and no one is quite sure why. Dan Falk investigates.

    • Dan Falk
    News Feature
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Correspondence

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Books & Arts

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Concepts

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News & Views

  • As Shakespeare put it, “It is a wise father that knows his own child”. Male bluegill sunfish do: they adjust their behaviour towards their young according to how sure they are of being the real father.

    • John D. Reynolds
    • Ben C. Sheldon
    News & Views

  • Observing distant galaxies is always problematic. But when it comes to the biggest star-forming galaxies, far across the Universe, only indirect approaches can give astronomers any handle at all.

    • Lennox Cowie
    News & Views

  • Multiple sclerosis is characterized by immunological attacks across a wide front in the brain and spinal cord. In mice, the damage can be partly repaired by neural precursor cells, delivered into the blood or spinal fluid.

    • Lawrence Steinman
    News & Views

  • The bacterium-filled nodules found on legumes represent a mutually beneficial arrangement. But it is evidently one with sophisticated checks and balances to ensure a fair deal for both partners in the marriage.

    • Janet Sprent
    News & Views

  • How far down does the ancient continental material that constitutes Earth's 'tectosphere' extend? Fresh interpretation of the behaviour of seismic waves helps in reconciling previous estimates.

    • B. L. N. Kennett
    News & Views

  • The discovery that a single protein allows certain immune cells both to respond to low oxygen levels and to induce inflammation may provide a new target for drugs to treat diseases characterized by excessive inflammation.

    • Carl Nathan
    News & Views
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Brief Communication

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Article

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Letter

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Introduction

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Overview

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Review Article

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Corporate Support

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Prospects

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Postdocs

  • Without doing the homework, choosing a postdoc position is a bit like picking a playing card at random. Karen Kreeger advises on how to come up trumps.

    • Karen Kreeger
    Postdocs
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Insight

  • The cytoskeleton of eukaryotic cells pervades the cytoplasm. As well as establishing cell and tissue shape, cytoskeletal proteins influence many cellular functions, including cell migration, movement of organelles and cell division. Topics covered by this Collection of reviews include the basic principles of filament organization, the operation of motor proteins and the role of the cytoskeleton in key biological processes.

    Insight
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