Evolutionary biology: Caught right-handed p689
Are two penises better than one? Not so, implies a study of doubly endowed earwigs. An ancestral behavioural preference for the right penis might have facilitated the loss of the left in species that arose later.
A. Richard Palmer
doi:10.1038/444689a
Full Text | PDF (602K)
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50 & 100 Years Ago p692
doi:10.1038/444692a
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Chemical biology: Renewing embryonic stem cells p692
Embryonic stem cells have great potential in medicine, but the current methods used to grow them prevent their therapeutic use. A dual-action compound has been discovered that may help solve this problem.
Reka R. Letso and Brent R. Stockwell
doi:10.1038/444692b
Full Text | PDF (197K)
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Condensed-matter physics: Defects and perfect flows p693
The discovery that parts of a solid helium crystal could flow through other parts without friction ignited physicists' interest. Independent experiments confirm this unusual superflow, but its origin remains mysterious.
Henry R. Glyde
doi:10.1038/444693a
Full Text | PDF (203K)
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Oceanography: Plankton in a warmer world p695
Satellite data show that phytoplankton biomass and growth generally decline as the oceans' surface waters warm up. Is this trend, seen over the past decade, a harbinger of the future for marine ecosystems?
Scott C. Doney
doi:10.1038/444695a
Full Text | PDF (233K)
See also: Editor's summary
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Ion channels: A paddle in oil p697
How do voltage-gated ion channels in cell membranes open? The latest work suggests that the process depends on having the correct lipid molecules in the membrane, with phosphate groups being mandatory.
Anthony G. Lee
doi:10.1038/nature05408
Full Text | PDF (320K)
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Chemistry: Metals line up for DNA p698
The versatile DNA molecule has found many applications beyond biology. In its latest role, it serves as a self-assembling scaffold to arrange different metal ions in a row, like pearls on a string.
Jens Müller
doi:10.1038/444698a
Full Text | PDF (181K)
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Astrophysics: Unity among black holes p699
Black holes box at two weights: active galactic nuclei are in the super-heavyweight class, whereas galactic black holes are relative featherweights. But does the same physics pack both objects' punches? It seems that it does.
Jörn Wilms
doi:10.1038/444699a
Full Text | PDF (118K)
See also: Editor's summary
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Correction p699
doi:10.1038/444699b
Full Text | PDF (118K)
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Obituary: Reinhart Heinrich (1946–2006) p700
Pioneer in systems biology.
Marc W. Kirschner
doi:10.1038/444700a
Full Text | PDF (165K)
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Top of pageBrief Communications
Nectar bat stows huge tongue in its rib cage p701
The extreme length of this bat's tongue might have coevolved with the long flowers it pollinates.
Nathan Muchhala
doi:10.1038/444701a
First paragraph | Full Text | PDF (361K) | Supplementary information
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Navigation: Bat orientation using Earth's magnetic field p702
Richard A. Holland, Kasper Thorup, Maarten J. Vonhof, William W. Cochran and Martin Wikelski
doi:10.1038/444702a
First paragraph | Full Text | PDF (198K) | Supplementary information
See also: Editor's summary
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Top of pageBrief Communications Arising
Evolutionary Biology: Evidence for sympatric speciation? pE12
U. K. Schliewen, T. D. Kocher, K. R. McKaye, O. Seehausen and D. Tautz
doi:10.1038/nature05419
First paragraph | Full Text | PDF (1,010K)
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Evolutionary Biology: Evidence for sympatric speciation? (Reply) pE13
Marta Barluenga, Kai N. Stölting, Walter Salzburger, Moritz Muschick and Axel Meyer
doi:10.1038/nature05420
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