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Science News Archive March 2002 - Page 3


Page 3 of 8

Students may be learning more about avoidance strategies than arithmetic in math class

A new study found that classrooms where students used fewer avoidance strategies were more likely to have teachers who emphasized understanding, effort, and enjoyment. Teachers in these 'mastery-oriented' classrooms helped students build understanding, provided motivational support, and modeled their own thinking processes.

SourceAmerican Psychological Association·JournalJournal of Educational Psychology·DateMar 21, 2002

New dinosaur related to Triceratops

A newly discovered dinosaur, Liaoceratops yanzigouensis, has provided valuable insights into the evolution of horned dinosaurs. Weighing only about seven pounds, it had rudimentary horns and a frill, unlike its larger cousin Triceratops.

SourceField Museum·JournalNature·DateMar 20, 2002

Novel anti-coagulant clears hurdle

Duke University cardiologists report that DX-9065a, an experimental anti-coagulant, has cleared another hurdle in becoming a potential new treatment for patients with coronary artery disease. The agent inhibits Factor Xa, preventing blood clot formation earlier in the coagulation process.

Discovery supports theory of a single species of ancestor

A new million-year-old skull found in Ethiopia contradicts recent suggestions of a split in the homolineage between Eurasiatic and African populations. The team's detailed analysis shows genetic continuity between populations, indicating movement and mobility between them, consistent with a single species Homo erectus.

SourceYale University·JournalNature·DateMar 20, 2002

Weird wave behavior near earth's core

Researchers used experiments and mathematical modeling to understand seismic wave behavior in the lower mantle, finding that mineral grain alignment causes unusual wave behavior. The study provides a window into Earth's inner workings and is an important step toward integrating seismology and geodynamics in the lower mantle.

SourceUniversity of Michigan·JournalNature·DateMar 20, 2002

Study shows synthetic pheromone in women’s perfume increases intimate contact with men

Researchers at San Francisco State University found that 74% of women wearing perfume with a synthetic pheromone experienced an increase in sociosexual behaviors, including kissing, affection, and sexual intercourse. The study concluded that the pheromone increased the attractiveness of women to men, leading to more romantic behavior.

SourceSan Francisco State University·JournalPhysiology & Behavior·DateMar 20, 2002

Undersize infants score higher on IQ tests if breast fed exclusively

Under-sized infants who were exclusively breastfed for the first six months scored higher on IQ tests at five years of age compared to those with formula or solids introduced early. The study's findings also support the benefits of exclusive breastfeeding on cognitive development, without compromising growth.

Riverways create as much pollution as highways

A new study reveals that river traffic emits substantial nitrogen oxide, fine particulate matter, and sulfur oxides pollution, rivaling that of highways. The research, led by James J. Corbett, finds boat and ship emissions contribute significantly to regional air quality, particularly in the Columbia River Gorge National Scenic Area.

SourceAmerican Chemical Society·JournalEnvironmental Science & Technology·DateMar 19, 2002