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September 8, 1973 | Vol. 104 | No. 10
Cornell project brings peregrines back to the eastern United States
No bird was more harmed by the overuse of DDT...
Letters to the Editor
Defining the human species Having read “Humans benefited by interbreeding” (SN: 10/8/11, p. 13), I wonder if I have missed what, to me, seems a major change in the definition of “species.” I was taught that the attempted crossbreeding of animals of two different species could result in either no offspring or sterile offspring.
If modern humans carry genetic information from...
LIFE Cycads, often called "dinosaur plants," aren't so ancient after all. Read "Cycads not 'living fossils.' "
HUMANS Ancient cooking pots show diets shifted slowly from fishing to agriculture. See "Early farmers' fishy menu."
ON THE SCENE BLOG The Drake Equation for tallying alien life turns 50. See "The Drake Equation: All in the family," with a link for SN subscribers to a Q...
November 22Learn cocktail chemistry at the Houston Museum of Natural Science. Go to www.hmns.org
December 1Explore all things that glow at San Francisco’s Exploratorium. Ages 18 and up. See www.exploratorium.edu/afterdark
December 5Make folded structures in a workshop at St. Paul’s Science Museum of Minnesota. See www.smm.org/librarylaboratory
NEW EVIDENCE FOUND OF EXPANDING UNIVERSE — The universe is expanding, then collapsing again after a long time, evidence from photographs taken with the 200-inch telescope atop Mt. Palomar indicate. Dr. William A. Baum of Mt. Wilson and Palomar Observatories, Pasadena, Calif., said that present-day observations are not compatible with a steady-state universe in which matter is...