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Articles in July 13, 1991 issue of Science News

• Volcanic suspect in global murder mystery - volcanic eruptions in Siberia may have caused the Permo-Triassic mass extinction
  by Richard Monastersky
• Forever Fortran: digital language renewed - Fortran 90, the latest version, approved as international standard
  by Ivars Peterson
• A legacy of war: as the Gulf region chokes, the global climate breathes easier - oil fires in Kuwait threaten the climate locally but not worldwide - Cover Story
  by John Travis
• Shrinking Arctic ice - measuring sea ice to gauge greenhouse warming
• Pumped up and strung out: steroid addiction may haunt the quest for bigger muscles
  by Bruce Bower
• Hydrogen reunion mediated by light - lasers used to reunite electrons and protons to form hydrogen, a step toward creating antimatter
  by Ivars Peterson
• Quake rocks southern California - June 28, 1991, originating in the San Gabriel Mountains
• Hot prospects for quelling cluster headaches - capsaicin, a compound found in hot peppers; surgical and light treatments
  by Janet Raloff
• Aspirin may block pregnancy hypertension
  by Kathy A. Fackelmann
• 'Mind map' would guide brain explorers - Institute of Medicine panel report federally funded brain research
  by John Travis
• Shuttle surprise: zeolites form odd rods - inorganic compound forms rod-shaped crystals after experiment aboard space shuttle Atlantis
  by Elizabeth Pennisi
• New meaning for 'dry-roasted' peanuts - Taiwanese researchers find that moisture content and roasting time affect peanut quality
• Peterson's lucid writings win math honor - Science News's Ivars Peterson wins Mathematics Communications Award from Joint Policy Board for Mathematics
  by Patrick Young
• STM scientists strong-arm silicon atoms - using scanning tunneling microscopes to manipulate silicon atoms
  by Elizabeth Pennisi
• Elusive bowtie pinned down - synthesis of spiropentadiene, a carbonaceous compound nicknamed bowtiediene because it is shaped like a bowtie
• Less precipitation over land areas - rain and snowfall declined in the 1980s