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CURRENT ISSUE HIGHLIGHTS: 
Weirdonomics and Quirkology
Whatever happened to...?
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ASK THE EXPERTS:
Why do migratory birds fly in a V-formation?
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October 28, 2007
 NOVEMBER 2007 CONTENTS |
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 Free preview. Full coverage available from Scientific American Digital
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| FEATURES |
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| COSMOLOGY | ||||||||||||||||||
| The Great Cosmic Roller-Coaster Ride | ||||||||||||||||||
| By Cliff Burgess and Fernando Quevedo | ||||||||||||||||||
| Could cosmic inflation be a sign that our universe is embedded in a far vaster realm | ||||||||||||||||||
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| SPECIAL REPORT | ||||||||||||||||||
| The Nuclear Threat | ||||||||||||||||||
| By Mark Fischetti | ||||||||||||||||||
| A look at strike capabilities worldwide, and how a bomb would affect single cities and people. | ||||||||||||||||||
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| SPECIAL REPORT | ||||||||||||||||||
| Nuclear Weapons in a New World | ||||||||||||||||||
| Countries are altering their nuclear arsenals, prompting the U.S. to refurbish its own warheads | ||||||||||||||||||
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| SPECIAL REPORT | ||||||||||||||||||
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A Need for New Warheads?
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| By David Biello | ||||||||||||||||||
| The U.S. government's proposal to build the first new nuclear warhead in two decades raises a host of questions | ||||||||||||||||||
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ADVERTISEMENT |
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| HUMANITARIAN RELIEF | ||||||||||||||||||
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The Science of Doing Good
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| By Sheri Fink | ||||||||||||||||||
| Information technology, satellite imaging and research carried out in disaster-relief areas have begun to transform humanitarian aid into a more efficient and less haphazard endeavor | ||||||||||||||||||
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| BIOLOGY | ||||||||||||||||||
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Cell Defenses and the Sunshine Vitamin
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| By John H. White and Luz E. Tavera-Mendoza | ||||||||||||||||||
| Scientists now recognize that vitamin D does much more than build strong bones and that many people are not getting enough of it. Is widespread D deficiency contributing to major illnesses? | ||||||||||||||||||
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| OBJECT LESSON | ||||||||||||||||||
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Blood Cells for Sale
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| By Emily Harrison | ||||||||||||||||||
| There's more to blood banking than just bagging blood | ||||||||||||||||||
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| INFORMATION TECHNOLOGY | ||||||||||||||||||
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Brilliant Displays
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| By M. Mitchell Waldrop | ||||||||||||||||||
| A new technology that mimics the way nature gives bright color to butterfly wings can make cell phone displays clearly legible, even in the sun's glare | ||||||||||||||||||
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| MEDICINE | ||||||||||||||||||
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Playing Defense Against Lou Gehrig's Disease
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| By Ann C. Kato and Patrick Aebischer | ||||||||||||||||||
| Researchers have proposed potential therapies for a paralyzing disorder once thought to be untreatable | ||||||||||||||||||
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Breaking Science News from Reuters
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