Breast Feeding
Its contraceptive effect is increasingly forgotten in the worldwide trend toward bottle feeding. In many developing nations the result is a rise in the rate of population growth and poorer infant health...
Features
Molecular Clouds, Star Formation and Galactic Structure
Radio observations show that the giant clouds of molecules where stars are born are distributed in various ways in spiral galaxies, perhaps accounting for the variation in their optical appearance...
The Diamond-Anvil High-Pressure Cell
This ingenious device makes it possible to replicate the pressure near the core of the earth by turning a thumbscrew. Its widespread application has revolutionized the study of high-pressure phases...
The Tornado
This intense whirlwind has been one of the most elusive phenomena in meteorology. New observation techniques are now revealing how it is spawned by a thunderstorm and promise to uncover the flow inside...
Vision by Man and Machine
How does an animal see? How might a computer do it? A study of stereo vision guides research on both these questions. Brain science suggests computer programs; the computer suggests what to look for in the brain...
Cell-Adhesion Molecules: A Molecular Basis for Animal Form
Molecules mediating cell-to-cell adhesion appear dynamically during development. They may regulate cell movements and tissue placements that govern both the shape of the embryo and the formation of organs...
The Nesting Behavior of Dinosaurs
The discovery of large numbers of dinosaur eggs and skeletons of young dinosaurs at two sites in Montana has led to a novel interpretation of the social relations of these extinct reptiles...
Prehistoric Rice Cultivation in Southeast Asia
Recent archaeological work in the region demonstrates that the domestication of the grain led to the rise of city-states and the development of trade contacts with India and China...
Departments
50 And 100 Years Ago: April 1984
Science And The Citizen, April 1984
- Letters
Letters to the Editors, April 1984
- Recommended
Books, April 1984
- Amateur Scientist
The Amateur Scientist, April 1984
- Departments
The Authors, April 1984
Computer Recreations, April 1984
Bibliography, April 1984
