Volume 269, Issue 5
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Features
The Case for Free Trade
Environmentalists are wrong to fear the effects of free trade. Both causes can be advanced by imaginative solutions
The Perils of Free Trade
Economists routinely ignore its hidden costs to the environment and the community
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
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
The Art of Boris Artzybasheff
A compelling mid-20th century vision of the machines of war and peace
High-Power Electronics
A new generation of silicon switches enables power grids to meet the needs of utility customers with high efficiency and reliability
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
A Lab of Her Own
Despite decades of struggle, women remain a small minority in the scientific community