Children and the Elderly in the U.S.
Since 1960. the elderly have fared far better than children at the hands of society. The reasons are related to shifts in the relative sizes of the two groups and to changes in the American family...
Features
Atomic Memory
Atomic systems that have decayed from some ordered states can be induced to recover their initial order. The degree to which order is restored allows investigation ofinteractions difficult to observe...
How Embryonic Nerve Cells Recognize One Another
Developing neurons seek one another out and interconnect with high specificity. In the insect embryo they appear to do so by following pathways whose surface is labeled by specific recognition molecules...
The Digital Reproduction of Sound
By recording sound as a series of discrete numbers superior reproduction can be gained; so can a dramatic enhancement of recordings of performances made with other technologies
Prey Detection by the Sand Scorpion
This nocturnal hunter of the Mojave Desert does not see or hear the insects it feeds on. Instead it has receptors on its legs that are extraordinarily sensitive to subtle disturbances of the sand...
The World's Deepest Well
Now at 12,000 meters, a research well at Kola in the Soviet Arctic has revealed the cause of a seismic discontinuity and has pioneered drilling techniques for the deep exploration of the earth's crust...
Turning Something Over in the Mind
The imagined rotation of an object mirrors a physical rotation. The mental process can be investigated objectively, yielding quantitative information about one form of spatial thinking
The Spanish Ship of the Line
Pride of place among the greatest warships of the age of sail is generally accorded to the English. Yet Spain's "Santísima Trinidad" was the largest and most formidable ship of the era...
Departments
50 and 100 Years Ago: December 1984
Science and the Citizen, December 1984
- Letters
Erratum
Letters to the Editors, December 1984
- Recommended
Books, December 1984
- Amateur Scientist
The Amateur Scientist, December 1984
- Departments
The Authors, December 1984
Computer Recreations, December 1984
Annual Index 1984
Bibliography, December 1984
