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Features

Telomeres, Telomerase and Cancer

An unusual enzyme called telomerase acts on parts of chromosomes known as telomeres. The enzyme has recently been found in many human tumors and is being eyed as a new target for cancer therapy

By Carol W. Greider and Elizabeth H. Blackburn

Malnutrition, Poverty and Intellectual Development

Research into childhood nutrition reveals that a poor diet influences mental development in more ways than expected. Other aspects of poverty exacerbate the effects

By J. Larry Brown and Ernesto Pollitt

The Global Positioning System

Two dozen satellites hovering thousands of miles out in space are allowing people to locate themselves on the earth's surface with remarkable precision

By Thomas A. Herring

Seeing Underwater with Background Noise

With a technique called acoustic-daylight imaging, sounds in the sea can "illuminate" submerged objects, thereby creating moving color pictures without sonar

By Michael J. Buckingham, John R. Potter and Chad L. Epifanio

Colossal Galactic Explosions

Enormous outpourings of gas from the centers of nearby galaxies may ultimately help explain both star formation and the intergalactic medium

By Sylvain Veilleux, Gerald Cecil and Jonathan Bland-Hawthorn

The Bacteria Behind Ulcers

One half to one third of the world's population harbors Helicobacter pylori, "slow" bacteria that infect the stomach and can cause ulcers and cancer there

By Martin J. Blaser

The Loves of the Plants

Carl Linnaeus classified plants according to their reproductive parts, endowing them as well with sex lives reflecting 18th-century values and controversies

By Londa Schiebinger

Quarks by Computer

Yearlong computations have helped to confirm the fundamental theory behind quarks -- and, using its principles, even to identify a new particle

By Donald H. Weingarten

Departments

  • From the Editor

    Letter from the Editors, February 1996

  • Letters

    Erratum

  • Letters to the Editors

  • TechnoFiles

    Teleconomics

  • Recommended

    Reviews and Commentaries--Hands-on Astronomy

  • Anti Gravity

    Sinister Movements

  • 50, 100 & 150 Years Ago

    50, 100 and 150 Years Ago: Uranium Concerns, Meteorite Explosion and Fire Extinguishers

  • Wonders

    The Physics of Binary Numbers

  • Profile

    Dennett's Dangerous Idea

  • Mathematical Recreation

    Proof of Purchase on the Internet

  • Amateur Scientist

    Growing Seedlings at Less than 1 G

  • Science and the Citizen

    Keeping Vaccines Cold

  • Frozen Assets

  • Radar Range

  • The Doctor Glut

  • Schizophrenia Revisited

  • The Rainbow Majority

  • Going Out with a Bang

  • A Harebrained Scheme

  • By the Numbers

    Fluoridation

  • Connections

    Show Time!

  • Departments

    Reaching an Economic Event Horizon

  • Investigating Miracles, Italian-Style

  • Field Notes

    Bose Knows P.R.

  • Technology and Business

    Bill Gates's Apocryphal History

  • Green Policies

  • A New Way to Spell Relief: V-e-n-o-m

  • More Rules of the Road

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February 1996

Reanimate Your Brain

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