Scientific American, Volume 234

acetaldehyde alcohol angiogenesis animals antibody antigens aromatic atmosphere atoms bacteria base behavior binding bonds bottom brain calculator called carbon catastrophe cells chemical chromatin coal color complex contours crocodile cube cusp density diapause Digital display earth effect electric electron energy engineering experiments Fermilab fireflies fluorescent forage fuel galaxies gene graph gravitational hadrons hormone hydrocarbons hydrogen illustration increase interaction laboratory layer leptons light liver lymphocytes mass measure mechanism membrane ment messenger RNA million molecules muon neutrinos Nile crocodile nuclear observed opal operation particles pattern percent Petersen graph photographs plants problem protein reactor receptor region repressor result rings robot rotation SCIENTIFIC AMERICAN scientists sequence space species spiders stomatopod structure surface technique temperature theory tion tissue trivalent graphs tumor ture University volcanoes