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Features

The Unseen Genome: Gems among the Junk

Just when scientists thought they had DNA almost figured out, they are discovering in chromosomes two vast, but largely hidden, layers of information that affect inheritance, development and disease

By W. Wayt Gibbs

Why We Sleep

The reasons that we sleep are gradually becoming less enigmatic

By Jerome M. Siegel

Flying on Flexible Wings

Future aircraft may fly more like birds, adapting the geometries of their wings to best suit changing flight conditions

By Steven Ashley
Stranger in a New Land
Evolution

Stranger in a New Land

Stunning finds in the Republic of Georgia upend long-standing ideas about the first hominids to journey out of Africa

By Kate Wong

The Future of String Theory -- A Conversation with Brian Greene

The physicist and best-selling author demystifies the ultimate theories of space and time, the nature of genius, multiple universes, and more

An Army of Small Robots

For robot designers these days, small is beautiful

By Robert Grabowski, Luis E. Navarro-Serment and Pradeep K. Khosla

The Asteroid Tugboat

To prevent an asteroid from hitting Earth, a space tug equipped with plasma engines could give it a push

By Russell L. Schweickart, Edward T. Lu, Piet Hut and Clark R. Chapman

Departments

  • Weekend Weather

  • Letters

    Letters

  • Erratum

  • Advances

    Healing the Grid

  • Light Sails to Orbit

  • Malcode Melee

  • Restoring the Rio

  • Brain Not Inflamed?

  • Cleaner Living

  • Killing the Competition

  • Edward Teller, 1908-2003

  • Bacterial Batteries

  • Black Hole Life Preserver

  • Recommended

    Limited Visibility

  • Skeptic

    Candle in the Dark

  • Anti Gravity

    A Bridge Too Far

  • 50, 100 & 150 Years Ago

    Mathematics of Children -- Culture of Crete -- Philosophy of Heat

  • Perspectives

    Penny-Wise, Planet-Foolish

  • In Brief

    Data Points: November 2004

  • Brief Bits: Novemeber 2003

  • Puzzling Adventures

    Liquid Switchboard

  • Voyages

    Waiting for Liftoff

  • Staking Claims

    Shrink-Wrapping the World

  • Innovations

    Baffling the Bots

  • By the Numbers

    Why Women Work

  • Working Knowledge

    Staying Power

  • Departments

    Fuzzy Logic

  • Ask the Experts

    Ask the Experts: November 2003

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November 2003

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