Neuroscience: It's all in the timing p359
Taking hormones to replace those lost during menopause helps many women with their symptoms, yet it may also cause cognitive decline. Could the age at which hormones are taken determine whether they will be beneficial or harmful? Tom Siegfried reports.
doi:10.1038/445359a
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High-density memory: A switch in time p362
By 2020 the semiconductor industry wants a memory device that can store a trillion bits of information in an area the size of a postage stamp. As companies race towards this goal, chemists are coming up with an unusual approach. Philip Ball reports.
doi:10.1038/445362a
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Top of pageCorrespondence
Journals should set a new standard in transparency p364
Robert P. Dellavalle, Kristy Lundahl, Scott R. Freeman and Lisa M. Schilling
doi:10.1038/445364a
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Wise words from women aren't among top sellers p364
Kathleen Taylor
doi:10.1038/445364b
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Polluting effects of Brazil's sugar-ethanol industry p364
Luiz Antonio Martinelli and Solange Filoso
doi:10.1038/445364c
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Magenta and yellow in images is not a bright idea p364
John Runions
doi:10.1038/445364d
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Top of pageBooks and Arts
Dark days at the White House p365
Has the George W. Bush administration manipulated science for political ends?
John Horgan reviews Undermining Science: Suppression and Distortion in the Bush Administration by Seth Shulman
doi:10.1038/445365a
Full Text | PDF (426K)
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The Universe's quantum monkeys p366
Artur Ekert reviews Programming the Universe: A Quantum Computer Scientist Takes On the Cosmos by Seth Lloyd
doi:10.1038/445366a
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Cover story p367
John Galloway reviews Skin: A Natural History by Nina G. Jablonski
doi:10.1038/445367a
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Science in culture p368
Chart toppers
An exhibition explores the diverse ways of putting data on the map.
Martin Kemp
doi:10.1038/445368a
Full Text | PDF (170K)
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Top of pageEssay
Connections
Biology's next revolutionp369
The emerging picture of microbes as gene-swapping collectives demands a revision of such concepts as organism, species and evolution itself.
Nigel Goldenfeld and Carl Woese
doi:10.1038/445369a
Full Text | PDF (127K)
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Top of pageNews and Views
Mathematical physics: On the right scent p371
Searching for the source of a smell is hampered by the absence of pervasive local cues that point the searcher in the right direction. A strategy based on maximal information could show the way.
Dominique Martinez
doi:10.1038/445371a
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Atomic physics: The social life of atoms p372
In a trail-blazing experiment 50 years ago, it was observed that photons from far-off stars bunch up. But in fact there's a more general distinction among free, non-interacting particles: bosons bunch, and fermions 'antibunch'.
Maciej Lewenstein
doi:10.1038/445372a
Full Text | PDF (544K)
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Surface chemistry: Repellent legs p373
Andrew Mitchinson
doi:10.1038/445373a
Full Text | PDF (307K)
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Structural biology: Pass the protein p375
Modifier proteins, such as ubiquitin, are passed sequentially between trios of enzymes, like batons in a relay race. Crystal structures suggest the mechanism of transfer between the first two enzymes.
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