Stopping the Production of Fissile Materials for Weapons
A halt in producing the essential ingredients of nuclear weapons would be easy to verify. It could therefore contribute to tighter control over the amount of weaponry in the superpowers' arsenals...
By Barbara G. Levi, David H. Albright and Frank von Hippel
Acoustic waves within the sun are visible as oscillations on the solar surface. Their pattern and period hold clues to structure, composition and dynamics in the sun's interior
By John W. Leibacher, Juri Toomre, Robert W. Noyes and Roger K. Ulrich
Fragments of the plant cell wall have been discovered that serve as regulatory molecules. They help to control such functions as growth, development, reproduction and defense against disease...
By Alan G. Darvill and Peter Albersheim
The Compartmental Organization of the Golgi Apparatus
This cellular organelle modifies proteins, sorts them and packages them for delivery. Recent work shows the Golgi is divided into three compartments, each specialized for a different type of modification...
By James E. Rothman
Chemical reaction rates are controlled by varying the composition of miniscule clusters of metal atoms. Such clusters are now employed in petroleum refining and may have a number of other applications...
By John H. Sinfelt
A Web-Building Jumping Spider
Unlike most other jumping spiders, the Australian species Portia fimbriata builds webs. With acute vision and deceptive predatory tactics, it hunts other spiders both in webs and on the open ground...
By Robert R. Jackson
Slips of the Tongue
They offer glimpses of the process underlying one of the most complex of all behaviors: speech. The study of slips is facilitated by several research techniques that induce slips in the laboratory...
By Michael T. Motley
A yellow substance found on rocks and leaves in Southeast Asia is alleged to be an agent of chemical war. The material is indistinguishable from the feces of indigenous honeybees
By Jeanne Guillemin, Joan W. Nowicke, Matthew Meselson, Pongthep Akratanakul and Thomas D. Seeley