Organic Matter from Space
Recent studies have found in meteorites organized elements and hydrocarbons. Are they remnants of life or perhaps nonbiological carbon compounds formed early in the history of the solar system?...
Features
Electric Location by Fishes
It is well known that some fishes generate strong electric fields to stun their prey or discourage predators. Gymnarchus niloticus produces a weak field for the purpose of sensing its environment...
The Two-Neutrino Experiment
An account of the heroic experiment, involving a 30-billion-volt accelerator, a 10-ton spark chamber and 45 feet of armor plate, that demonstrated that there is not one kind of neutrino but two...
The Genetic Code: II
A sequel to F. H. C. Crick's article of last October, which discussed how the hereditary material embodies the code for the manufacture of proteins. The nature of the code has now been further elucidated...
The Nature and Measurement of Anxiety
A psychological entity must be defined if it is to be measured. Through factor analysis psychologists seek to define anxiety in terms of the variables that are its clearest manifestations...
Ball Lightning
This rare form of lightning may represent a stable configuration of a plasma of charged particles. If it does, it may help to solve the problem of confining a plasma within a thermonuclear reactor...
The Operation on President McKinley
An hour after he was shot in 1901, McKinley underwent surgery. A recently discovered record kept by one of his doctors provides a detailed account of the unsuccessful effort to keep him alive...
How Sap Moves in Trees
It is lifted up to the leaves and flows down with the products of photosynthesis. It can now be delicately sampled by tapping the tiny stylets that a feeding aphid pushes into a single cell...
Departments
50 and 100 Years Ago: March 1963
Science and the Citizen: March 1963
- Letters
Letters to the Editors, March 1963
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
