 
					Ashley Yeager is the associate news editor at Science News. Previously, she worked at The Scientist, where she was an associate editor for nearly three years. She has also worked as a freelance editor and writer, and as a writer at the Simons Foundation, Duke University and the W.M. Keck Observatory. She was the web producer for Science News from 2013 to 2015, and was an intern at the magazine in the summer of 2008. She holds a bachelor’s degree in journalism from the University of Tennessee, Knoxville, and a master’s degree in science writing from MIT. Her book, Bright Galaxies, Dark Matter and Beyond, on the life of astronomer Vera Rubin, will be published by MIT Press in August.
 
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All Stories by Ashley Yeager
- 			 Genetics GeneticsScorpion’s sting evolved from insects’ defensive proteinsWith a single genetic mutation, an insect’s defensive proteins can be transformed into a toxin that gives scorpions their signature sting, a new study shows. 
- 			 Genetics GeneticsMicrobe and human genes influence stomach cancer riskWhen genes of the bacterium and its human host evolve together, the strain is less harmful than that same strain in a person whose ancestors didn't encounter that particular microbe. 
- 			 Genetics GeneticsElephant shark genome small and slow to evolveThe animals have the smallest genome of non-bony fishes and the slowest-evolving genes among vertebrates, a study suggests. 
- 			  Extinct ocean reptiles now appear in colorFossilized turtle, mosasaur and ichthyosaur tissue holds skin pigments that give scientists clues about what the animals looked like and how the coloration may have helped in colder climates. 
- 			  Social networks stay small despite social networkingWhen adding new friends to social circles, people unconsciously bump others out, keeping social circles small and finite. 
- 			 Health & Medicine Health & MedicineNanoparticle injection blocks breast cancer growth in miceA nanoparticle-based therapy delivered directly to the mammary ducts could potentially stop pre-cancerous cells from becoming full-blown breast cancer, scientists say. 
- 			 Astronomy AstronomySigns of cloudy skies seen in two exoplanet atmospheresExoplanets GJ 436b and GJ 1214b have signatures of clouds in their atmospheres, but the skies are like nothing seen in the solar system. 
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- 			 Astronomy AstronomySpace station pump fixed after two spacewalksThe repair allowed astronauts to restore power to the labs and experiments running on the space station. 
- 			 Astronomy AstronomyExoplanet dangerously close to demiseKepler-91b could be on the brink of death — at least on astronomical time scales. 
- 			 Astronomy AstronomyGaia spacecraft launches to map Milky WayThe ESA spacecraft blasted off from Europe’s Spaceport in Kourou, French Guiana, at 4:12 am EST. 
- 			 Neuroscience NeuroscienceParkinson’s patients drive better with brain stimulationPatients make fewer errors with a little help from implanted electrodes, at least on a computer.