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Articles in July 28, 2007 issue of Science News

• Weighting for friends: obesity spreads in social networks
  by Bruce Bower
• Antidepressants trim suicide tries
• Chasing Kangaroos: A Continent, a Scientist, and a Search for the World's Most Extraordinary Creature
• Sop story: new porous gel soaks up heavy metal
  by Alexandra Goho
• Saturn's retinue: 60 and counting
• Silence of the Songbirds
• Virtual surgery: doctors can simulate heart operations with the click of a mouse
  by Erica Klarreich
• A hole and the head
  by William A. Stephens
• Stunting growth: ozone will trim plants' carbon-storing power
  by Sid Perkins
• Erosion accelerates along Alaskan coast
• Experimental Mathematics in Action
• Sweet gatekeeper: receptor depends on sugar and water
  by Carolyn Barry
• Universities seek armchair astronomers
  by Janet Raloff
• Not-so-elementary bee mystery: detectives sift clues in the case of the missing insects
  by Susan Milius
• Maybe it's about sex
  by Eliza Gouverneur
• Good light: sun early in life could protect against MS
  by Nathan Seppa
• Old viruses have new tricks
• Gut Feelings: The Intelligence of the Unconscious
• Body of Work: Meditations on Mortality from the Human Anatomy Lab
• Grim reap purr: nursing home feline senses the end
  by Brian Vastag
• Perception is longevity
  by Patrick Barry
• Heavenly chemistry: astronomers announce astrophysical anion
  by Ron Cowen
• Gyro Q & A
  by Lee Hukill
• Slick serpent
  by Davide Castelvecchi
• Gas on gas?
  by Fredric M. Blum