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Features

Coral Bleaching

Environmental stresses can cause irreparable harm to coral reefs. Unusually high seawater temperatures may be a principal culprit

By Barbara E. Brown and John C. Ogden

How the Milky Way Formed

Its halo and disk suggest that the collapse of a gas cloud, stellar explosions and the capture of galactic fragments may have all played a role

By Sidney van den Bergh and James E. Hesser

Carbohydrates in Cell Recognition

Telltale surface sugars enable cells to identify and interact with one another. New drugs aimed at those carbohydrates could stop infection and inflammation

By Nathan Sharon and Halina Lis

The Earliest History of the Earth

Radioactive dating techniques have illuminated vast stretches of geologic history, bringing the most ancient eras of the earth's evolution into view

By Derek York

Madagascar's Lemurs

These primates can tell us a great deal about our own evolutionary past. But many species are already extinct, and the habitats of those that remain are shrinking fast

By Ian Tattersall

Quantum Dots

Nanotechnologists can now confine electrons to pointlike structures. Such “designer atoms” may lead to new electronic and optical devices

By Mark A. Reed

Adapting to Complexity

By Russell Ruthen

Departments

  • Profile: Rita Levi-Montalcini

  • The Mind and Donald O. Hebb

  • Geometry Acquisition

  • Heavenly Objects

  • Letters

    Letters to the Editors, January 1993

  • 50, 100 & 150 Years Ago

    50 and 100 Years Ago: Silent Submarines and Homemade Fireworks

  • Essays

    The Life of a Black Scientist

  • Amateur Scientist

    Biodiversity in the Backyard

  • Science and the Citizen

    How Many Genes and Y

  • Endangered Genes

  • Pitohui!

  • Crunching Epsilon

  • A Gene for Hypertension

  • Anything Goes

  • Machos or Wimps?

  • Booby Prizes

  • Departments

    Erratum

  • Technology and Business

    Back to Roots

  • National Conundrums

  • Soft Lego

  • Habeas Corpus

  • The Return on Infrastructure

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January 1993

Think Outside the Gift Box