Infant Mortality in the U.S.
After many years of a steady drop in the infant mortality rate in the U.S. the rate of decline has abruptly slowed. The change coincides with cutbacks in programs for mothers and children
Volume 253, Issue 1
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Features
The Moons of Uranus, Neptune and Pluto
When Voyager 2 flies by Uranus in January and by Neptune in 1989, it will send back closeup pictures of their icy moons. Ground-based studies of the outer solar system suggest what the probe might find
The Fundamental Physical Limits of Computation
What constraints govern the physical process of computing? Is a minimum amount of energy required, for example, per logic step? There seems to be no minimum, but some other questions are open
The Evolution of Darwinism
Recent developments in molecular biology and new interpretations of the fossil record are gradually altering and adding to the synthetic theory, for 40 years the standard view of the process of evolution
The Chemosensory Recognition of Genetic Individuality
Genes regulating immunologic function impart to individual mice a characteristic scent. A mouse can thus discriminate genetic differences among its potential mates by smell alone
Minoan Palaces
At the center of Crete's rich Bronze Age culture was the palace, which had economic, political and religious functions. Studying those functions makes it posslble to reconstruct Minoan society
Fossil Water under the Sinai-Negev Peninsula
By studying the water issuing from springs and wells scattered across the Sinai and the Negev deserts, hydrogeologists have identified a great aquifer formed during the last glacial age
Milkweeds and their Visitors
The insects and other animals that frequent milkweed form a model community for the study of interactions among species. The animals come to forage, but a few of them also serve the needs of the plant