The Chaotic Genesis of PlanetsLong viewed as a stately procession to a foregone conclusion, planetary formation turns out to be startlingly chaotic
Regulating Evolution: How Gene Switches Make LifeSwitches within DNA that govern when and where genes are turned on enable genomes to generate the great diversity of animal forms from very similar sets of genes
Nuclear Fuel Recycling: More Trouble Than It's WorthPlans are afoot to reuse spent reactor fuel in the U.S. But the advantages of the scheme pale in comparison with its dangers
Science 2.0 -- Is Open Access Science the Future?Is posting raw results online, for all to see, a great tool or a great risk?
How Cells Clean HouseWorn-out proteins, malfunctioning organelles, invading microorganisms: all are swept up by tiny internal "vacuum cleaners" that keep a living cell healthy. If the process, called autophagy, can be kept in good working order, aging itself might be delayed
Hooked from the First CigaretteNew findings reveal that cigarette addiction can arise astonishingly fast. But the research could lead to therapies that make quitting easier
Fighting Killer WormsBloodsucking worms called schistosomes are among the world's most worrisome human parasites. A new genome sequence and powerful genetic tools promise to help crack their secrets
50, 100 & 150 Years Ago
100 Years Ago in Scientific American: The Wright Brothers' First Flight
This Is Your Mom on Drugs: Aging Doesn't Stop Drug Use
Whatever Happened to the Pioneer Spacecraft?
Are Personal Genome Scans Medically Useless?
Do You See What I See?
Sir Arthur C. Clarke, 19172008
Naps for Better Recall
Following the Money
Finding Fossils Faster
Down to the Wire
Antigravity: Catalogue Gizmos of Questionable Efficacy
We Need More Novels about Real Scientists
From the Editor
Preparing for Doomsday
Dark Forces at Work
Letters to the Editors
Fluoridation Solar Power Congress and Science
Why the Next President Needs a Powerful Science Adviser
Animated Dimensions Desperate Contentment Crucial Numbers
The Brain Is Not Modular: What fMRI Really Tells Us
The African Green Revolution (Extended version)
Working Knowledge: Living Cover