Scientific American Year 1990 Magazine Back Issues

Features
Can Computers Think?
Ice Ages: A New Theory Explains The Climatic Seesaw.
Is The Universe Right - Or Left-Handed?
Cosmic Background Explorer Will Tune In On The Big Bang In A Search For Clues To The Origin Universe

Features
Why Morphine Taken For Pain Is Not Addictive.
Gallium Arsenide: A Dynamic Technology Comes Of Age.
Altruism In - Would You Believe It? - Vampire Bats
Variable Inferno: The Churning Sun Grows Brighter And More Turbulent As It Approaches The Peak Of It

Features
Trends In Communications: The Road To The Global Village.
Earthquakes: Should The Midwest Brace For A Big One?
Physicists Predict - And Find - New Radioactivities.
Observatories On The Moon: A Hold Proposal For A Practical Lunar Scientific Outpost.

Features
Does A Black Hole Tie At The Center Of Our Galaxy?
PCR: Turning DNA Needles Into Information Haystacks.
The Promise Of Light Water Reactors.

Features
DNA Fingerprinting: When Untried Technology Takes The Stand.
Will Mutant Neutrinos Confirm Grand Unification Theory?
Turning The Immune System Against Tumors.
Trends In Transportation: From The Microchip To The Greenhouse Effect. Powerful Forces Are Changing

Features
RU 486: The Story Behind The Controversial Abortion Pill.
Cold, Distant Pluto Reveals Some Of Its Secrets.
How Bats Extract A Wealth Of Data From Their Biosonar.

Features
Trends In Aerospace: Can Space Be Commercialized?
The Immune Assault That Causes Diabetes.
Why We Should Take Immediate Steps To Slow Global Warming.

Features
The Threat Of Third World Ballistic Missiles.
Fighting The Opportunistic Infections Of AIDS.
Why Some Ceramics Are Superconductors.
Reconstructions Of Maya Murals: The Artist' Paint Box Provides Invaluable Aid To Scientists Studying

Features
September 1990 $3.95
Special Issue
Energy For Planet Earth

Features
What Killed The Dinosaurs - A Meteor Or A Volcanic Eruption?
Tight-Bending Crystals For Optical Computers.
Trends In Cosmology! New Observations Challenge Theory.

Features
Black Holes Quasars And The Birth Of The Universe.
What Do Dreams Really Mean?
Treating Inherited Diseases With Implanted Genes.
This Minuscule Quantum Dot Traps Electrons In Zero Dimensions, It Heralds A New Era In Designer

Features
Photographing The Birth Of Molecules With Laser Pulses.
Animals That Survive Winter By Freezing Solid.
The Nuclear Holocaust Could Still Happen - By Accident.