Alexander Semenov/Cultura Science/Getty Images (cover); DUNCAN1890 /ISTOCKPHOTO (right)
- NewsScientists have long thought that epigenetic changes, which alter gene activity, can cause cancer. Now they have demonstrated it in a mouse experiment.
- NewsNorth Pacific dead zone may grow smaller, not expand, as climate change weakens Pacific Ocean trade winds.
- News in BriefData linking disorder to immune cells couldn’t be replicated, scientists say.
- NewsParasites that are less susceptible to artemisinin now affect several Asian countries.
- IntroducingIt’s not clear yet whether the bacteriophage crAssphage, found in people’s intestines, has any health effects.
- Reviews & PreviewsFrom numerals to infinity, symbols have advanced mathematical thinking.
- Letters to the EditorReaders discuss Dulles' microscapes exhibit, baby birthweights and what should be done about the triclosan problem.
- Editor's NoteStories on jellyfish, Ebola, carbon capture's future and heart disease's past reveal how crises old and new often lead to science's healthiest advances.