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Articles in Oct 19, 1996 issue of Science News

• 1996 Ad
  by Ivars Peterson
• Et tu, clean room filter? - filters used to keep rooms clean during the manufacture of computer chips may in themselves be a source of contamination - Materials Science - Brief Article
• Cometary ices may have interstellar origin - analysis of comet Hyakutake suggests that cometary ices may originate from interstellar cloud rather than outer part of solar disc - Brief Article
  by Ron Cowen
• Core concerns: the hidden reaches of Earth are starting to reveal some of their core secrets - Cover Story
  by Richard Monastersky
• A hormone's reputation takes a beating - knock-out mice lacking gene for oxytocin mate, give birth and nurture their young naturally - Brief Article
  by John Travis
• Ice resists melting in warm conditions - methane clathrate may protect ice from melting - Materials Science - Brief Article
• Early cross-cultural ties arise in China - Bronze Age graves and artifacts indicate that early Chinese civilization was influenced by northerners including Caucasians - Brief Article
  by Bruce Bower
• Alzheimer's mouse, part III - mice created that develop beta-amyloid plaques and memory problems characteristic of Alzheimer's disease - Biomedicine - Brief Article
• 1996 Ad
  by Corinna Wu
• Sparking fusion: a step toward laser-initiated nuclear fusion reactions - National Ignition Facility proposed
  by Ivars Peterson
• Precollege science and math 'lack focus.' - diversity of math and science teaching methods across the US contributing to poor achievement scores compared to children of other countries - Brief Article
  by Janet Raloff
• Contraceptive concerns about HIV - study suggests progestin-based contraceptives may thin vaginal walls, increasing risk of HIV infection - Biomedicine - Brief Article
• Ozone hole starts strong, fades quickly - 1996 ozone levels above Antarctica did not drop below those of 1995 as predicted - Brief Article
  by Richard Monastersky
• The mystery of seeds' speedy passage - research indicates that trees do not lace fruit with laxatives to encourage quicker passage of seed through birds' digestive tracts - Biology - Brief Article
• 1997 Ad
  by Dan Vergano
• Migrants seek out berry, berry rich food - migratory songbirds switch from insect- to fruit-rich diet during autumn migration - Biology - Brief Article
• Prozac and pregnancy - pregnant women taking depression-fighting fluoxetine showed no higher risk of miscarriage than pregnant women not taking the drug - Biomedicine - Brief Article
• New analysis links abortion, cancer
  by Steve Sternberg
• Cow's milk: new link to diabetes? - study indicates that beta casein protein in cow's milk may trigger insulin-dependent diabetes - Biomedicine - Brief Article