Scientific American Magazine

These devices generate light in such a manner as to open up a whole new realm of applications for electromagnetic radiation. The salient feature of the light they produce is that its waves are all in step

A study of "troops" of baboons in their natural environment in East Africa has revealed patterns of interdependence that may shed light on the early evolution of the human species

When the involuntary movements of an image across the retina are prevented, the image fades and reappears in a manner that provides new information on two major theories of perception

When a virus infects a bacterium, the genes of the virus sometimes act as genes of their host. The phenomenon has illuminated the mechanism of both heredity and infection

Certain stars seem dimmer than normal stars having the same temperature. It now appears that they are not less luminous but are bluer because they are poorer in the heavier elements

The capital of King Croesus of Lydia in the sixth century B. C., this city In Asia Minor was successively conquered by the Persians, the Greeks, the Romans and the Byzantines

This little known but remarkably potent member of the family of B vitamins has been a biochemical puzzle for three decades. The details of its functions are only now beginning to emerge

A sensitive instrument that points the way to ore deposits and oil fields by detecting magnetic anomalies from the air has greatly broadened the scope of geophysical exploration