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The trial in Libya of six medics accused of infecting children with HIV ends next week. With the defendants facing possible execution, Declan Butler asked AIDS experts to assess the case against them.
The cheerful leaves of the poinsettia could be hiding an unwelcome visitor this festive season. Rex Dalton goes in search of the whitefly, a potentially devastating pest.
There's a fight going on inside all our cells for each breath of air. Nick Lane sheds therapeutic light on the implications for cancer and degenerative diseases.
An international data bank of nuclear explosives is needed to determine the source of nuclear materials following an explosion, argue Michael May, Jay Davis and Raymond Jeanloz.
The profound biological changes that lofted the honeybee to an advanced state of social organization are reflected in its newly sequenced genome. The species can now be studied all the way from molecule to colony.
There has long been scepticism about the geochemical evidence that the ancient ocean was markedly warm. A fresh approach bolsters the case for an ocean that, in the distant past, was indeed quite hot.
It was once thought that lampreys evolved from armoured jawless vertebrates. But a recently discovered lamprey fossil dates from the twilight age of their supposed ancestors, and looks surprisingly modern.
A rotation in light's electric-field vector can alter the light's frequency. This rotational equivalent of the Doppler effect has proved surprisingly elusive, but has now been spotted in the laboratory.
Gutless marine worms harness the resources of a team of bacteria in lieu of a digestive or excretory system. A genome-sequence analysis now defines the roles of the microbes.
Is the anomalously high electrical conductivity seen in part of Earth's mantle caused by protons derived from hydrous defects in the mineral olivine? Two groups investigate this possibility — and draw different conclusions.
A series of crystallographic 'snapshots' of tRNA maturase reveals the molecular changes in the enzyme that holds it in place on the tRNA, accommodating incoming CTP and ATP nucleotides, and allowing repositioning of the active site after each of the first two CMP residues are added.
Evidence for superfluidity of ultracold fermionic atom pairs in an optical lattice details that such systems are highly controllable, making them attractive models for studying analogous problems such as high-temperature superconductivity.
A combination of nuclear magnetic resonance measurements and computer simulations is used to probe directly the dynamics of molecular uptake, both inside and out of the hysteresis regime, and identifies marked differences in the dynamics that are directly correlated with the existence or otherwise of hysteresis.
A meta-analysis of experimental studies addresses the relationship between species diversity and ecological functioning, and concludes that reduction in species loss does affect ecological functioning, but that the magnitude of these effects depends on which species are actually lost.
Light microscopy is undergoing a renaissance, with a huge range of tools and techniques for gathering biological data with unprecedented speed and resolution. Michael Eisenstein takes a closer look.
An alliance of universities in the north of England hopes to transform Britain's former industrial heartland into a centre of scientific excellence. Paul Smaglik reports.
