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PlantsPetite pollinators: Tree raises its own crop of couriers
A common tropical tree creates farms in its buds, where it raises its own work force of tiny pollinators.
By Susan Milius -
AstronomySupernova dealt deaths on Earth? Stellar blasts may have killed ancient marine life
The explosion of nearby supernova may have caused the widespread extinction of marine life on Earth 2 million years ago.
By Ron Cowen -
ChemistryViral parts: Chemists convert virus into nanoscale tool
Researchers are decorating viruses with a variety of molecules, making the microbes into potential building blocks in electronic circuits and new materials, as well as tools in biomedical therapies.
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Health & MedicineOminous signals: Genes may identify the worst breast cancers
By using a technology that reveals patterns of gene activity in tumor cells, researchers can detect breast cancers that are likely to spread and become deadly.