Dyslexia
Mirror writing and similar problems are usually blamed on defects in visual perception, but in truth dyslexia seems to be a complex linguistic deficiency. The remedy is proper instruction in reading
Features
The Structure of Poliovirus
The virus renowned for its devastating effects has become a model for in vestigating the molecular links between form and function. Analysis of its structure will enlarge the scope of viral research.
Cooling and Trapping Atoms
Atoms are slowed and cooled by radiation pressure from laser light and then trapped in a bottle whose walls are magnetic fields. Cooled atoms are ideal for exploring basic questions of physics.
Monoculture
This practice, which entails growing the same crop on the same land repeatedly, has certain advantages for farmers but may not always be good agronomy.
Optical Neural Computers
Can computers be built to solve problems, such as recognizing patterns, that entail memorizing all possible solutions? The key may be to arrange optical elements in the same way as neurons are arranged in the brain
The Rifting of Continents
It begins above a hot zone in the mantle. Upwelling molten rock underplates and weakens the continental crust, piercing it at discrete points and finally "rifting" it in two: an ocean is born
Thermoregulation in Winter Moths
Curiously lacking in highly specialized adaptations for the cold, certain nondescript moth species can nevertheless do what their relatives cannot: fly, feed and mate at near-fi-eezing temperatures
A Mesolithic Camp in Denmark
On a small rise that was once an island an unusual excavation has yielded clues to the rich foraging culture that flourished on the coasts of northern Europe during the Middle Stone Age
Departments
50 and 100 Years Ago: March 1987
Science and the Citizen, March 1987
- Letters
Letters to the Editors, March 1987
- Recommended
Books, March 1987
- Amateur Scientist
The Amateur Scientist, March 1987
- Departments
The Authors, March 1987
Computer Recreations, March 1987
Bibliography, March 1987
