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The New Challenges

By John Horgan

Theoretical Resistance

What makes some ceramics superconductive?

By Philip Yam

Essential but Expendable

When do master genes regulate cell growth?

By John Rennie

Racing Light

Can computer networks handle the traffic?

By Elizabeth Corcoran

Shaking the Tree

Will statistical analysis of DNA pinpoint human origins ?

By Philip E. Ross

Puzzling Powerhouse

Black holes power the brightest galaxies, but how?

By Russell Ruthen

Quantum Dissidents

Is there unexpected order in the cosmos ?

By Tim Beardsley

Cambrian Jolt

How often did mass extinctions reshape evolution?

By Tim Beardsley

Cellular Response

Are antibodies the most effective defense against AIDS?

By Tim Beardsley

Thinking Green

Can environmentalism be a strategic advantage ?

By Elizabeth Corcoran

Running Hot

Will jet engines create a market for advanced materials ?

By Gary Stix

Finding Fault

Can seismologists predict earthquakes?

By Gary Stix

Unlikely Messengers

How do nerve cells communicate?

By Marguerite Holloway

Learning from Asian Schools

American schools could benefit from the teaching styles and institutional structures used in Asia-many of which were pioneered here

By Harold W. Stevenson

Extremely Cold Antiprotons

Cooling and trapping of these particles at energies one ten-billionth of what was feasible six years ago should make possible production of the first antimatter atoms

By Gerald Gabrielse

Directed Molecular Evolution

Biochemists have harnessed Darwinian evolution on a molecular scale. Through cycles of selection, amplification and mutation, populations of macromolecules can be pushed to evolve toward any functional goal...

By Gerald F. Joyce

What Columbus "Saw" in 1492

When Christopher Columbus arrived in the New World, he brought with him a rich load of cultural preconceptions that strongly influenced his perceptions of the land and its inhabitants

By I. Bernard Cohen

The Human Voice

How the voice works was largely unknown until modern technology became available. New instruments are now improving the care and treatment of the voice

By Robert T. Sataloff

Experimental Market Economics

Laboratory microcosms of the commercial world shed light on the principles that govern trading and suggest ways to make real markets more effective

By Vernon L. Smith and Arlington W. Williams

Meaning and Mind in Monkeys

Nonhuman primates, such as vervet monkeys, seem to communicate in ways that resemble aspects of human speech. But they do not seem to recognize mental states in others

By Dorothy L. Cheney and Robert M. Seyfarth

Why do we Age?

To a great extent, the answer is written in our genes. But which ones? New research offers tantalizing clues.

By Ricki L. Rusting


  • Letters

    Letters to the Editors, December 1992

  • Erratum

  • Recommended

    Science Books for Young People 1992

  • 50, 100 & 150 Years Ago

    50 and 100 Years Ago: December 1992

  • Mathematical Recreation

    Christmas in the House of Chaos

  • Departments

    Annual Index 1992

  • Imperial English: The Language of Science?

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