... (212) 98 0-8 175 or call (800)77 7-0 444.Scientific American- branded products avail-able. For free catalogue, write Scientific Ameri-can Selections, P.O. Box 11314, Des Moines,IA 5034 0-1 314, or ... the toxic-ity tests required by the WHO—provid-ed the Ethiopian government renouncedNews and Analysis24 Scientific American April 1996Tool TimeHumans, aside from the accident-prone co-median ... trapped in amber yield25-million-year-old DNACopyright 1996 Scientific American, Inc.Last October a jury in Reno, Nev., ordered Dow Chemical Com-pany to pay Charlotte and Mar-vin Mahlum $14.1...