Labor-Intensive Agriculture
The $18-billion U.S. fruit and vegetable industry is increasingly reliant on illegal-immigrant labor. By postponing mechanization it is becoming vulnerable to cheaper produce from other countries...
Features
The Engineering of Magnetic Fusion Reactors
Design projects under way and experimental reactors now being built will test the practicality of schemes for generating power from the thermonuclear fusion of ions trapped by magnetic fields...
The Large-Scale Structure of the Universe
Across blllions of light-years space is a honeycomb of galactic superclusters and huge voids. The structure may result from perturbations in the density of matter early in the big bang
The Processing of RNA
DNA is transcribed into messenger RNA, which is then translated into protein. In cells that have a nucleus, including human cells, a lot happens to the RNA between transcription and translation...
The Dead Sea
Five years ago the world's most hypersaline lake "turned over" dissipating a dense body of fossil brine that had been isolated from any contact with the atmosphere by fresher water above it...
Six Millenniums of Buffalo Kills
At a site in western Canada named Head-Smashed-In, Indian hunters slaughtered buffalo by stampeding the herd over a cliff. They started in 3700 B. C. and continued until well after the white men had come...
The Extinction of the Ammonites
Changes in the shells of these nautliuslike marine animals at the end of their long history suggest they were fighting a losing battle against more mobIle, shell-crushing predators
Bilateral Negotiations and the Arms Race
A historical review of the negotiating positions of the U.S and the U.S.S.R. in several major arms-control talks suggests that each side has special problems in dealing with the other
Departments
50 and 100 Years Ago: October 1983
Science and the Citizen, October 1983
- Letters
Letters to the Editors, October 1983
- Amateur Scientist
The Amateur Scientist, October 1983
- Departments
The Authors, October 1983
Computer Recreations, October 1983
Books, October 1983
Bibliography, October 1983
