Bound volume for 1986, including articles on: Jul (Halley's comet; lowest mass stars; cytokinin; medical uses of fluorescence excitation analysis; organic solids; cryptography), Aug (biotechnology for enhanced oil recovery; el Nino-the climate changer; photochemical nitrogen fixation; liposomes), Sep (Geomagnetism; crops that need heat to grow; controlled drug release; whales; video programme on a research and development laboratory), Oct (robot mathematics; amorphous semiconductors; polymers in medicine; how plants fight insects; upwelling-an oceanic phenomenon), Nov (space probes to Saturn; superconductivity; biological and abiological nitrogen fixation), Dec (origin of atmospheric ozone; Jatinga; immunity to cancer; submerged weeds)