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Scientific American Magazine November 1996 Issue

Features
The Case for Electric Vehicles
New technological developments have put practical electric cars within reach, but politics may slow the shift away from internal-combustion engines
Daniel Sperling| November 1, 1996|
Sharks and the Origins of Vertebrate Immunity
Sharks, which have existed for as many as 450 million years, offer glimpses of a distant period in the evolution of the immune system
Gary W. Litman| November 1, 1996|
Rock Art in Southern Africa
Paintings and engravings made by ancestors of the San peoples encode the history and culture of a society thousands of years old
Anne Solomon| November 1, 1996|
Quantum Seeing in the Dark
Quantum optics demonstrates the existence of interaction-free measurements: the detection of objects without light—or anything else —ever hitting them
Paul Kwiat, Harald Weinfurter and Anton Zeilinger| November 1, 1996|
Immunity and the Invertebrates
The fabulously complex immune systems of humans and other mammals evolved over hundreds of millions of years -- in sometimes surprising ways
Gregory Beck and Gail S. Habicht| November 1, 1996|
Global Climatic Change on Mars
Today a frozen world, Mars at one time; may have had more temperate conditions, with flowing rivers, thawing seas, melting glaciers and, perhaps, abundant life
Jeffrey S. Kargel and Robert G. Strom| November 1, 1996|
Dyslexia
A new model of this reading disorder emphasizes defects in the language-processing rather than the visual system. It explains why some very smart people have trouble learning to read
Sally E. Shaywitz| November 1, 1996|
Can China Feed Itself?
Some surprisingly reasonable policy changes would enable the world's largest nation to produce more food for its 1.2 billion citizens
Roy L. Prosterman, Tim Hanstad and Li Ping| November 1, 1996|
Departments
50, 100 & 150 YEARS AGO
50, 100 and 150 Years Ago
 
AMATEUR SCIENTIST
Much Ado about Nothing
 
ANTI GRAVITY
On Presidents and King
 
BY THE NUMBERS
Global Forest Cover
 
CONNECTIONS
What Goes Around Comes Around
 
CYBER VIEW
The Rosetta Hack
 
FIELD NOTES
Bring Me a Shrubbery
 
FROM THE EDITOR
An Honest Quantum Con Job
 
IN BRIEF
In Brief
 
IN FOCUS
The Price of Silence
 
LETTERS TO THE EDITORS
Letters to the Editors
 
MATHEMATICAL RECREATION
A Guide to Computer Dating
 
PROFILE
Starting with a Clean Slate
 
RECOMMENDED
Reviews and Commentaries
 
SCIENCE AND THE CITIZEN
Science with Brass
 
Multicultural Studies
 
Hot Jupiters
 
Different Strokes
 
TECHNOLOGY AND BUSINESS
Pump It Up
 
Pressure to Change
 
Pictures Worth a Thousand Cameras
 
Needles in A Cold War Haystack
 
Molecular Molds
 
WONDERS
Giant against Giant in the Dark
 
WORKING KNOWLEDGE
Television Ratings
 
as shown in picture
gently read
 
most scientific magazine back issues $2.99



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