... 2003 SCIENTIFIC AMERICAN, INC.NOVEMBER 2003With its multiple dams, flood-con-trol mechanisms and crop-irri-gating structures, the RioGrande has provided residents of Col-orado, New Mexico and ... Planetary Society,a space-interest group, and the entertain-ment media firm Cosmos Studios [see“Sailing on Sunlight,” News Scan, Sci-entific American, July 2001]. Both or-ganizations, which can ... SCIENTIFIC AMERICAN, INC.28 SCIENTIFIC AMERICAN NOVEMBER 2003TIM FITZHARRIS Minden PicturesnewsSCANthreatening and relatively unimpressive en-dangered species called the Rio Grande sil-very...