The Puzzle of Declining Amphibian Populations
The number of frogs, toads and salamanders is dropping in many areas of the world. The causes range from destruction of their local habitats to global depletion of the ozone layer
Features
Quest for the Limits of the Heliosphere
Four aging spacecraft are racing to the outer reaches of the solar system. Soon they may break through the last barriers to interstellar space
Machines That Learn from Hints
Machine learning improves significantly by taking advantage of information available from intelligent hints
Understanding the Genetic Construction of Behavior
Studies of courtship and mating in the fruit flyoffer a window on the ways genes influence the execution of complex behaviors
The Art Historian's Computer
Riddles posed by ancient works of art fall to historical analyses and electronic explorations
A Brief History of Infinity
The infinite has always been a slippery concept. Even the commonly accepted mathematical view, developed by Georg Cantor,may not have truly placed infinity on a rigorous foundation
The Tapestry of Power in a Mesopotamian City
Mashkan-shapir was for a brief time one of the most important cities in the civilized world. Its remains challenge traditional notions of power distribution in early urban society
The Price of Prevention
Policymakers frequently suggest that preventive medicine pays for itself. In fact, studies now show that this claim is rarely true. Still, prevention is often a worthy health investment
Departments
- Letters
Letters to the Editors, April 1995
- Recommended
Memory Wars
- 50, 100 & 150 Years Ago
50 And 100 Years Ago: Wool Protection and Liquid Hydrogen
- Profile
Engineering the Future
- Amateur Scientist
Computerized Restoration of Juvenile Art
- Science and the Citizen
Bracing for the Next Big One
The End of the Road
Astronomers in the Dark
Sun Spotting the Difference
A Ringside View of Stars
I get no Kick from CH3CH2OH
Coming Out in the Sciences
Fighting All the Time
Down and Out in the Gulf of Mexico
Catching That Wave
- Departments
The Insignificance of Statistical Significance
The Poor Person's Guide to The Bell Curve
- Technology and Business
Coming in for a Landing
A Widget's Best Friend
Genes in the Not So Public Domain
Simply, the Best
Voting for a Cure
The Fishy Business of Waste
Changing the Image
