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Light in the Ocean's Midwaters

Beneath the surface of the ocean, sunlight is, gradually extinguished, but the resulting darkness yields to a host of bioluminescent creatures

By Bruce H. Robison

The Problematic Red Wolf

Is the red wolf a species or a long-established hybrid of the gray wolf and the coyote? Such distinctions may aect ongoing eorts to save a variety of endangered species

By John L. Gittleman and Robert K. Wayne

Protecting the Greenback

Digital color systems can reproduce paper money with disconcerting accuracy. The U.S.government's response is a new series of notes

By Robert E. Schafrik and Sara E. Church

Treating Diabetes with Transplanted Cells

The implants, islet cells of the pancreas, can potentially cure many cases of diabetes. A prime obstacle to wide use -- lack of a safe way to avoid immune attacks on the grafts -- now seems to be crumbling

By Paul E. Lacy

The Trebuchet

Recent reconstructions and computer simulations reveal time. Operating principles of the most powerful weapon of its time

By Les Eigenbrod, Paul E. Chevedden, Vernard Foley and Werner Soedel

Plastics Get Wired

By tailoring the electrical properties of conducting polymers, researchers hope to render electronics a bit more organic

By Philip Yam


  • Cookstoves for the Developing World

  • J. Robert Oppenheimer: Before the War

  • Letters

    Letters to the Editors, July 1995

  • Recommended

    Beauty in the Beast

  • 50, 100 & 150 Years Ago

    50 and 100 Years Ago: Improvements to Women's Shoes and Colored Fires

  • Profile

    A Skeptically Inquiring Mind

  • Mathematical Recreation

    Election Fever in Blockvotia

  • Science and the Citizen

    Darwin Denied

  • On the Level

  • Bashing Black Holes

  • Artistic Genes

  • Fright of the Bumblebee

  • The Waterfall Illusion

  • Just Scratch it

  • Toxins Abounding

  • An Inside Job

  • A River (of Mud) Still Runs Through it

  • Departments

    Computation Outstrips Analysis

  • Rest and Relaxation on the Net

  • Field Notes

    In the Atomic Corral

  • Technology and Business

    It's Melting, It's Melting

  • Environmental Secrets

  • Food Indigo

  • When Smog gets in your Eyes

  • A Prime Patent

  • Follow the Money

  • Ceramic Superwire

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July 1995