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The Dinosaurs of Arctic Alaska

Seventy-five million to 70 million years ago, a group of hardy dinosaurs thrived in the harsh climate of what is now northern Alaska

By Anthony R. Fiorillo

Are Viruses Alive?

Although viruses challenge our concept of what "living" means, they are vital members of the web of life

By Luis P. Villarreal

Optics and Realism in Renaissance Art

A much publicized assertion holds that 15th-century painters achieved a new level of realism with the help of lenses and mirrors. But recent findings cast doubt on that idea

By David G. Stork
The 2004 Scientific American 50 Award
The Sciences

The 2004 Scientific American 50 Award

Our third annual salute to the people and institutions brightening our future recognizes accomplishments in stem cells, nanocomputers, mini fuel cells and more



  • Marijuana Research

  • More Than Just Music

  • Stormy Weather

  • The Brain's Own Marijuana

  • The Case of the Pilfered Planet

  • A Mini Human Species

  • Stressing Violence

  • Brief Points: December 2004

  • Ask the Experts

  • Letters


  • Advances

    Firing on Half-Cylinders

  • Nanosize Me

  • The Beat Goes On

  • So Much for Green Salvation

  • Wave-Riding Electrons

  • Excluding Inclusion Bodies

  • Recommended

    Orangutan Technology

  • Skeptic

    Common Sense

  • Anti Gravity

    Number One

  • 50, 100 & 150 Years Ago

    Necessary Protein -- Wild Herbs -- Unfiltered Water

  • By the Numbers

    Thwarting Big Brother

  • Working Knowledge

    Crowded Skies

  • Insights

    Geographer of the Male Genome

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December 2004

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