
Death Watch
Updates on four dubious but enduring theories
John Horgan, who has written for Scientific American since 1986, comments on science on his free online journal Cross-Check. He has also posted his books Mind-Body Problems and My Quantum Experiment online. Horgan teaches at Stevens Institute of Technology.

Death Watch
Updates on four dubious but enduring theories

Free Radical
A word (or two) about linguist Noam Chomsky

Open Skies
An old proposal for legal spying gains new life

Mandelbrot Set-To
Did the father of fractals "discover" his namesake set?

Right to Lie?
Studies disprove claims about abortion's dangers

Test Negative
A look at the evidence justifying illicit-drug tests

R.I.P. Blackbird
A legendary spy plane is brought down to earth

Indecent Burial
Obstacles to the disposal of nuclear waste proliferate

Quasicrystal Clear
Is entropy the driving force behind this odd form of matter?

Claude E. Shannon
Unicyclist, juggler and father of information theory

Photogenic Science
A colorful balloon and raft help rain-forest researchers

Quantum Consciousness
Polymath Roger Penrose takes on the ultimate mystery

Land-Locked
Increasingly, experts question the need for land-based missiles

Hot Spot
Computers re-create weather of an ancient supercontinent

The Masai
These pastoralists are key to the future of Kenya's wildlife

Cosmic Collisions
Computer simulations suggest how elliptical galaxies formed

Ethnography as Art
"Complexifier" Clifford Geertz ponders anthropology's future

The Finance of Fission
Wall Street is reluctant to back a resurgence of nuclear power

Ivan's Eyes
A ban ends, and antisatellite weapons make a comeback

Pinning Down Clouds
Scientists ponder the role of clouds in climatic change

Do Bees Think?
The discoverer of bat "sonar" thinks about animals' thoughts

Flash Point
U.S. fusion workers chafe under security restrictions

Econo-SDI
"Limited" antimissile schemes are gaining in popularity

Fusion's Future
Will fusion-energy reactors be "too complex and costly"?