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SpaceFrozen cosmic fingerprints
Researchers claim to find evidence of 11th century supernovas and the solar cycle in an ice core.
By Ron Cowen -
Health & MedicineDangers of biomedical plagiarism
The bogus data present in plagiarized biomedical papers is not just an ethical lapse, but also a threat to effective medicine.
By Janet Raloff -
MathThe four color problem gets a sharp new hue
Mathematicians find new answers to the still puzzling theorem that four colors suffice to color any map.
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ClimateChinese carbon dioxide emissions eclipse efficiency gains
A boost in manufacturing and construction in China led to an increase in carbon dioxide emissions that outstripped any gains from increased energy efficiency.
By Sid Perkins -
EarthBuckyballs do antimicrobial magic
A new study shows that soccer-ball–shaped carbon nanoparticles can prevent biofilm from gunking up water filters.
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PhysicsWhen the ink hits the page
Scientists investigate the physics of the most printable ink and find the most viscous inks don’t make the grade.
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Health & MedicineStudy finds plenty of apparent plagiarism
Featured blog: A data-mining program looks for and finds plagiarism among scientific papers. The researchers survey the papers' writers and editors.
By Janet Raloff -
ArchaeologyHorse domestication traced to ancient central Asian culture
New lines of evidence indicate that horses were domesticated for riding and milking more than 5,000 years ago by members of a hunter-gatherer culture in northern Kazakhstan.
By Bruce Bower -
Health & MedicineChemotherapy drug may in fact strengthen some cancer cells
Research shows a standard drug for treating brain cancer can actually make some cells more aggressive.
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TechWatching Earth for 25 years
The Landsat 5 satellite launched in 1984 with a mission to orbit and image Earth's surface for three years. Still in orbit, the satellite has continuously documented changes in landscape.
By Sid Perkins -
Health & MedicineNew drug shows benefits against nasty asthma
An experimental drug called mepolizumab prevents some emergency asthma attacks in people who no longer benefit from normal doses of steroids.
By Nathan Seppa -
AstronomyThese cosmic gluttons may be tight
Researchers may have discovered the most tightly bound pair of supermassive black holes known, an indication that two massive galaxies have merged.
By Ron Cowen