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Science Magazine

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  • Artist's reconstruction of Kulindadromeus zabaikalicus , from the Jurassic period, in its natural environment. | Andrey Atuchin Fossils unearthed in Siberia suggest that feathers may have been more widespread among dinosaurs than scientists have thought. Instead of being limited to theropods, the...
  • In pig hearts without normal pacemaker activity, researchers used gene therapy to transform heart cells into new rhythm keepers. | ©AAAS/Carla Schaffer Genetically altering heart muscle cells to make them regulate heart rate could be an alternative to implanting electronic pacemakers, according to...
  • Even when reduced to particles smaller than a grain of salt, plastic debris may pose a large threat to marine environments, researchers warn in a Policy Forum published in the 10 July issue of Science . Microplastics, pieces of plastic millimeters across or smaller, are likely the most abundant...
  • The wealth of hominin fossils from Sima de los Huesos is helping reveal trends in Neandertal evolution. | AAAS/Carla Schaffer Neandertals' trademark facial features appeared first in their evolution, while other defining features in their skulls came along later, researchers studying an impressive...
  • How can a crayfish become anxious? Researchers designed an experiment to trigger this feeling in the crustaceans. | AAAS/Carla Schaffer A new study of crayfish — the freshwater crustaceans that look like little lobsters — shows that the arthropods can get anxious when they are exposed to prolonged...
  • Was the moon born in a cosmic smash-up, or slowly shaped out of stardust like the Earth? Learn more in this episode of Science with a Twist , a new video series from AAAS. | AAAS/Carla Schaffer The origins of the moon have been as murky as a black hole's interior, with several hypotheses competing...
  • The placenta, long thought to be sterile, has a bacterial community similar to the one found in the mouth. | AAAS/Carla Schaffer A small but diverse bacterial community calls the placenta home, scientists have discovered. The findings, from a new study of hundreds of placentas taken from healthy...