A Virtually New Web

The collision of virtual reality and mapping brings excitement to cyberspace.

Letters

Letters from our readers.

The Feel of Water

Biolubricant for Arthritic Joints

A Bioplastic Goes Commercial

Finding Images

CO2 to Fuel

Death of a Cell

All-Day Solar Cells

Sensor City

Democratizing Robot Design

Dogs Tags for Virtual Sniffing

Better Biofuels

Artificial Intelligence Is Lost in the Woods

Why the quest for conscious machines is misguided. By David Gelernter

The Nintendo Wii

A game console with underwhelming graphics wins with neat controllers. By Daniel Turner

George Whitesides

The Harvard chemistry professor and nanotech pioneer turns to energy. By Kevin Bullis

Building an Immersive Web

Tomorrow's virtual worlds depend on real collaboration today. By Colin J. Parris

Metagenomics Defined

Genomics will help explain the microbial world. By Ed DeLong

Green Concrete

Nanoengineered materials could reduce greenhouse-gas emissions. By Franz-Josef Ulm

Iris Scanning, Now at JFK

Registered-traveler programs offer a quicker and more convenient journey, at a cost in privacy. By Bryant Urstadt

Artificial Societies and Virtual Violence

How modeling societies in silico can help us understand human inequality, revolution, and genocide. By Mark Williams

Brain Boosters

Our reporter enters the new world of neuroenhancers. Smart move? By David Ewing Duncan

Holographic Video for Your Home

A compact optical setup that produces 3-D video could make holography much less expensive. By Kate Greene

Information Technology

Biotechnology

Nanotechnology