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Features

Is Space Finite?

Conventional wisdom says the universe is infinite. But it could be finite, merely giving the illusion of infinity. Upcoming measurements may finally answer this ancient question

By Glenn D. Starkman, Jean-Pierre Luminet and Jeffrey R. Weeks

Embryonic Stem Cells for Medicine

Cells able to generate virtually all other cell types have recently been isolated. One day they could help repair a wide variety of damaged tissues

By Roger A. Pedersen

Encapsulated Cells as Therapy

An emerging approach to treating disease combines living cells with plastic membranes that shield the cells from immune attack

By Michael J. Lysaght and Patrick Aebischer

Skin: The First Tissue-Engineered Products

Last year the first living, tissue-engineered skin product became commercially available--and a second is expected to be on the market within a few months. Top researchers from each of the two companies involved tell how their products came to be

Tissue Engineering: The Challenges Ahead

The obstacles to building new organs from cells and synthetic polymers are daunting but surmountable

By Robert S. Langer and Joseph P. Vacanti

Alan Turing's Forgotten Ideas in Computer Science

Well known for the machine, test and thesis that bear his name, the British genius also anticipated neural-network computers and "hypercomputation"

By B. Jack Copeland and Diane Proudfoot

The Revival of Colored Cotton

By James M. Vreeland Jr.

Departments

  • A New Eye Opens on the Cosmos

  • From the Editor

    The Promise of Tissue Engineering

  • Attack of the Robo-Editor

  • Letters

    Letters

  • Errata

  • Recommended

    AESTHETIC SCIENCE

  • The Editors Recommend, April 1999

  • Anti Gravity

    Diamond Reflections

  • 50, 100 & 150 Years Ago

    50, 100 And 150 Years Ago: Before Plate Tectonics, Early Submarine and Fastest Worldwide Commerce

  • In Brief

    IN BRIEF

  • Profile

    NOT JUST FUN AND GAMES

  • Mathematical Recreation

    Tangling with Topology

  • Amateur Scientist

    Detecting "Hot" Clouds

  • Commentaries

    Circumnavigators All

  • Science and the Citizen

    A PROBING PRELUDE

  • A HUNDRED BILLION YEARS OF SOLITUDE

  • WHITEOUT

  • MUTATIONS GALORE

  • By the Numbers

    HEALTH CARE COSTS

  • Working Knowledge

    Working Knowledge on The Flight of the Frisbee

  • Connections

    CONNECTIONS

  • Cyber View

    Watch the Watchers

  • Technology and Business

    A BUG'S LIFT

  • WAITING FOR THE SUPERCAR

  • TAKING BALLISTICS BY STORM

  • JAPAN FIELDS A BIG LEAGUE LIGHT GATHERER

  • In Focus

    FACING AN ILL WIND

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April 1999

Help Us Reforest the Mississippi River Valley