Agriculture in China
The most populous nation appears to have achieved the objective of producing enough food for all its people. It has done so largely by the adoption of improved strains of rice and wheat
Features
How the Liver Metabolizes Foreign Substances
Among the most significant of the liver's chemical transformations are the inactivation of drugs, the detoxification of environmental pollutants and the activation of chemicals that can cause cancer...
Slavery in Ants
Certain species of ants raid the nests of other species for ants to work in their own nest. Some raiding species have become so specialized that they are no longer capable of feeding themselves...
Electron-Positron Annihilation and the New Particles
Energetic collisions between electrons and positrons give rise to the unexpected particles discovered last November. They may help to elucidate the structure of more familiar particles
Pulsating Stars
A star that varies regularly in brightness is vibrating like the air in an organ pipe. The fundamental vibration or its harmonics are strong clues to the star's composition and internal architecture...
Visual Motion Perception
The eye has no shutter, and yet a moving world does not appear as a blur. The visual system works not like a camera but more like a computer with a program of specific mathematical rules...
Pelagic Tar
Fine nets towed in the open ocean pick up ubiquitous black lumps, apparently the residue of sludge washed out of the hold of tankers. The stuff could probably be eliminated by good tanker procedures...
The Role of Music in Galileo's Experiments
A hitherto unpublished page of Galileo's working notes, preserved in Florence, implies a remarkably simple scheme for equalizing short time intervals. The secret of his success, it now appears, was a song...
Departments
50 and 100 Years Ago, June 1975
Science and the Citizen, June 1975
- Letters
Letters to the Editors, June 1975
- Recommended
Books, June 1975
- Mathematical Recreation
Mathematical Games, June 1975
- Amateur Scientist
The Amateur Scientist, June 1975
- Departments
The Authors, June 1975
Bibliography, June 1975
