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PlantsBotanists refine family tree for flowering plants
Two research teams have used the biggest array of flowering-plant genes yet to try to reconstruct the elusive evolutionary history of today's flowers.
By Susan Milius -
PhysicsSharper than expected
A new technique beats the resolution limits of ordinary microscopes in a way that seems to defy conventional optical theory.
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TechTractor beam
Magnetic nanoparticles selectively bind to specific bacteria and can drag them out of a liquid.
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HumansStrategies to improve teaching
Incorporating emerging data on how kids learn and cement ideas could help schools teach science more effectively, a new report argues.