Communication by Laser
The unique properties of the light produced by lasers open the way to the eventual exploitation of light waves for the long-distance transmission of electrical signals
Features
A Transpacific Contact in 3000 B.C.
Archaeological evidence strongly indicates that pottery found in Ecuador, the oldest known in the New World, was introduced there by fishermen who had drifted from Japan
The Bacterial Chromosome
When bacterial DNA is labeled with radioactive atoms, it takes its own picture. Autoradiographs reveal that the bacterial chromosome is a single very long DNA molecule and show how it is duplicated
The Ranger Missions to the Moon
Nine months after Ranger IX provided live television close-ups of the moon, the entire program of Ranger launchings is assessed
Orchids
There are more than 20,000 species of them, comprising the largest family of plants. Not all of them bear the ornate flowers used for corsages, but their evolutionary adaptations are remarkably diverse
Chemistry at High Velocities
Chemical change is classically studied as it occurs at minimum energies. “Hot” atoms, colliding at higher energies, yield new reactions and a broader view of the nature of chemical change
Adaptations to Cold
One mechanism is increased generation of heat by a rise in the rate of metabolism, but this process has its limits. The alternatives are insulation and changes in the circulation of heat by the blood
Fixed-Point Theorems
These somewhat implausible laws state that points must reappear in their original positions when the surfaces on which they lie undergo certain deformations. Their practical uses are numerous
Departments
50 and 100 Years Ago: January 1966
Science and the Citizen: January 1966
- Letters
Letters to the Editors: January 1966
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
