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The Reproductive Behavior of the Stickleback

To reproduce, this tiny fish engages in behaviors not commonly associated with such animals, including luring intruders away and cannibalizing another's eggs

By Gerard J. FitzGerald

The Evolution of Virulence

Human behavior appears to influence whether pathogens evolve into benign or harmful forms. Health policy should therefore include evolutionary considerations

By Paul W. Ewald

Modern Humans in the Levant

Modern Homo sapiens preceded Neanderthals on Mount Carmel and followed a similar pattern of life for 60,000 years. Biology thus cannot explain the cultural revolution that then ensued

By Bernard Vandermeersch and Ofer Bar-Yosef

Listening with Two Ears

Studies of barn owls offer insight into just how the brain combines acoustic signals from two sides of the head into a single spatial perception

By Masakazu Konishi

Cavity Quantum Electrodynamics

Atoms and photons in small cavities behave completely unlike those in free space. Their quirks illustrate some of the principles of quantum physics and make possible the development of new sensors

By Serge Haroche and Jean-Michel Raimond

Catalysis on Surfaces

Scientists can now observe how solids interact with individual molecules to speed reactions. Information about these catalysts is being used to improve everything from materials synthesis to pollution control

By Cynthia M. Friend

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