January 13th, 2001
issue

  • Two studies have contradictory findings about the impacts of animal protein on bones in elderly people. (p. 20)
  • Researchers have replaced animal protein with soybean protein in experimental plywood glue, potentially reducing cost and health worries. (p. 20)
  • Ancient mitochondrial DNA extracted from Homo sapiens fossils and anatomical links among H. sapiens crania from different regions both support a theory of geographically diverse human origins. (p. 21)
  • Death patterns from more than 400 volcanic eruptions through history may reveal ways to reduce the number of fatalities from similar causes in the future. (p. 21)
  • Each of the newly discovered systems features a star roughly similar to the sun and a bizarre entourage of planets and possibly a failed star that may provide fresh insight into planet formation. (p. 22)
  • Mice genetically engineered to make two proteins normally active in early nerve development are able to regrow damaged nerve fibers somewhat in their central nervous systems. (p. 22)
  • For the first time, bewildered researchers realized that a bootlace-size eunicid worm can move chunks of coral around, perhaps explaining how some coral reefs get started. (p. 23)
  • The 11-year cycle of solar storms has begun to peak, already affecting several Earth satellites and disturbing electric power systems on the ground, and scientists expect 2 more years of this solar maximum turmoil. (p. 26)
  • Transplants of skeletal-muscle cells may help heal hearts damaged by illness or previous heart attacks. (p. 30)
  • With the discovery of three additional planets that lie outside the solar system, astronomers have now found evidence of more than 50 extrasolar planets. (p. 24)
  • After 25 years, astronomers have relocated a tiny satellite of Jupiter. (p. 24)
  • A mutation of a gene on the X chromosome can lead to a dangerous autoimmune disorder and type I diabetes. (p. 24)
  • Regular cocaine use may account for one-fourth of nonfatal heart attacks in people under age 45. (p. 24)
  • A new, noninvasive technique could detect an impending failure in a rubber tire or conveyor belt. (p. 29)
  • Chemicals in the Japanese condiment wasabi could help prevent tooth decay. (p. 29)
  • A five-nation team of explorers has used Global Positioning System equipment to confirm that the source of the Amazon is a snowmelt-fed stream high in the Peruvian Andes. (p. 29)
  • Sediments from the Atlantic Ocean indicate that the now lush Amazon Basin was much drier during the latest ice age. (p. 29)
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