Ultrahigh Pressures
Laboratory apparatus is now capable of maintaining steady pressures of more than two million pounds per square inch. Under such extreme conditions matter exhibits new properties
Features
The Growth of Nerve Circuits
Recent studies of the process of nerve repair have led to a new theory of how the complex networks and pathways of the central nervous system are formed in the embryo
Health
Poisons
What is the molecular mechanism by which a toxic substance produces its effect? In seeking the answer for various poisons, investigators have found invaluable tools for the study of normal cell physiology...
The Invention of the Electric Light
It is generally assumed that Thomas Edison's incandescent lamp was the product of inspired tinkering. Actually it was but one element in a much deeper invention: an entire system of electric lighting...
The Language of Crows
One group of American eastern crows responds to recorded distress calls of French jackdaws, but another group does not. The more cosmopolitan life of the former may account for this difference...
High-Energy Cosmic Rays
Coming from outer space with energies greater than a billion billion electron volts, they provide a clue to the origin of cosmic radiation and suggest a new picture of our galaxy
Insects and Plant Galls
Certain Insects lay their eggs in specific plant tissues, causing the formation of a protuberance that nourishes the insect larva. How does the insect induce the plant to grow this abnormal tissue?...
The Idea of Man's Antiquity
When Father MacEnery found flint implements in the same stratum with the fossils of extinct animals, he pushed human history far beyond 4004 B.C., the date most people took as man's beginning...
Departments
50 and 100 Years Ago: November 1959
Science and the Citizen: November 1959
- Letters
Letters to the Editors, November 1959
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
