Scientific American Magazine

Small groups of men who live in the Stone Age may still be studied in remote corners of the world. They are fast dying out, presenting anthropologists with an emergency

At the border between infrared and radio waves lie electromagnetic ripples measured in millimeters. They are now made in the laboratory, where they are used to study the properties of atoms and molecules

This recently discovered network of cells in the brain has many vital functions, notably arousing and maintaining consciousness and choosing between important and unimportant sensory messages

It pumps five quarts of blood in a minute, 75 gallons in an hour, 70 barrels in a day and 18 million barrels in 70 years. It does this by means of the most intricately woven muscle in the body

Using this whimsical pseudonym, derived from the name of a general in the Franco-Prussian War, a group of young French mathematicians has written 20 volumes of an extraordinary treatise on mathematics

At the atomic level a metal is not as solid as it seems. Atoms, including its own, may wander through it. They may even diffuse out of one metal into another which is in close contact with it

During the past 30 years a deadly fungus disease has been steadily spreading through the U. S. oak population. Fortunately the disease can be controlled, but to control it will require strong measures

The head of the guillemot is either all black or bridled, i. e., decorated with markings resembling spectacles. This phenomenon, known as polymorphism, is a clue to the operation of evolution