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Features

X-ray Binaries

In these systems, ultradense neutron stars feed on their more sedate companions. Such stellar cannibalism produces brilliant outpourings of x-rays and drastically alters the evolution of both stars

By Edward P. J. van den Heuvel and Jan van Paradijs

The Perils of Free Trade

Economists routinely ignore its hidden costs to the environment and the community

By Herman E. Daly

The Case for Free Trade

Environmentalists are wrong to fear the effects of free trade. Both causes can be advanced by imaginative solutions

By Jagdish Bhagwati

High-Power Electronics

A new generation of silicon switches enables power grids to meet the needs of utility customers with high efficiency and reliability

By Narain G. Hingorani and Karl E. Stahlkopf

Chemical Signaling in the Brain

Studies of acetylcholine receptors in the electric organs of fish have generated critical insights into how neurons in the human brain communicate with one another

By Jean-Pierre Changeux

Ancient DNA

Genetic information that had seemed lost forever turns out to linger in the remains of long-dead plants and animals. Evolutionary change can at last be observed directly

By Svante Pääbo

A Lab of Her Own

Despite decades of struggle, women remain a small minority in the scientific community

By Marguerite Holloway

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