The End of the Monkey War
The Fundamentalist crusade against the theory of evolution subsided soon after the Scopes trial of 1925, but it was only three months ago that the last antievolution law of any consequence was killed...
Features
Ecological Chemistry
Certain insects feed on plants that make substances that are poisonous to vertebrates. Hence the insects are unpalatable to bird predators. These relations have surprising results
Organic Lasers
Complex organic-dye molecules have been induced to emit coherent laser light. The most remarkable feature of this new type of laser is that each can be tuned continuously over a range of wavelengths...
The Astrophysics of Cosmic Rays
These energetic particles have come to be regarded (along with the stars, planets, gas and dust and electromagnetic radiation) as one of the main Components of the universe
The Biochemistry of Anxiety
Patients with anxiety neurosis show an excessive rise in lactate, a normal metabolic product. A double-blind experiment has shown that anxiety symptoms and attacks can be induced by infusions of lactate...
Subsistence Herding in Uganda
The Karimojong drink the milk and blood of their cattle but rarely eat meat. Why do they not adopt the successful dairying and ranching practice of advanced nations? The answer is rooted in human ecology...
Rotary Engines
Several ingenious engines work with a rotary motion instead of the traditional reciprocating one. The aim is to combine the virtues of the reciprocating engine and the gas turbine
The Golgi Apparatus
For years the function of this cell component was a mystery. Now radioautography has clarified its role as the primary site for the packaging of secretions and the synthesis of large carbohydrates...
Departments
50 and 100 Years Ago: February 1969
Science and the Citizen: February 1969
- Letters
Letters to the Editors, February 1969
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
