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August 2006
vol. 51, no. 8

FEATURES

18 When Levees Fail
As New Orleans continues to recover from its failed levees, Central California is bracing for disaster with its aging levee system, and the Netherlands is leading the way for flood control.
Megan Sever

24 Hazardous Cracks Running Through Arizona
People — and their groundwater usage habits — are the source of a hazard that is threatening homes and people in Western states, in which small cracks in the ground grow to enormous sizes.
Ray Harris and M. Lee Allison

30 Nudging the Weather
Modern-day cloud seeders have new technology on their side, but still have a long way to go before proving their science works.
Lisa M. Pinsker


NEWS & VIEWS

7 COMMENT
Oregon’s Recipe for Mitigating Earthquakes

New laws are better protecting Oregonians from seismic hazards, but passing the legislation was a lesson in persistence and education.
Yumei Wang and William Burns

8 NEWS NOTES
Dwarfing Earth's largest dinosaur * Early life lines make waves * Faster tsunami warnings with GPS * Unlocking jade's secrets * Microbes reshuffle Earth's early history * Ancient bird fossil makes a splash * Open access advancing * From hot to cold in the Arctic * Tree rings reveal overestimate in Western water

17 POLITICAL SCENE
It’s Not Hairspray: America’s Need for Science Education

All citizens — including and especially politicians — need to become well-informed on scientific issues before addressing some of Earth’s most vexing problems.
Steven Quane

38 GEOPHENOMENA
Controversial Bosnian “pyramid”
Activating aftershocks

40 TRENDS & INNOVATIONS
Rivers in Chains

The Three Gorges Dam is fueling controversy in Asia.
Carolyn Gramling

44 EDUCATION & OUTREACH
Muddling Science at Parks and Museums
Disclaimers and reduced funding are challenging the public’s exposure to science in U.S. parks and museums.
Kathryn Hansen

46 ENERGY & RESOURCES
Shaking out more oil
Europe on Kyoto
Mineral resource of the month: Tellurium

48 GEOMEDIA
On Exhibit: The traveling Smithsonian
Books: Sharing Earth’s beauty: A review of Bedrock: Writers on the Wonders of Geology
Books: Societal shifts: A review of The Winds of Change: Climate, Weather, and the Destruction of Civilizations
On the Web: U.N. resources

52 PROFILES
Todd Hoeksema: A flare for all things solar

53 BENCHMARKS
August 10, 1846: Smithsonian Institution Founded
President James K. Polk signs the Smithsonian Institution Act, creating the U.S. museum system from the money bequeathed by Englishman James Smithson.

60 GEOLOGIC COLUMN
Where to Land?
Crater lake region or glacier — scientists have a lot to consider in choosing the perfect landing site for the next robotic mission to Mars.
Lisa Rossbacher

DEPARTMENTS
 4 From the Editor
 6 Letters:
Perspectives from readers
36 Where on Earth?

54 GeoMarketplace

55 Classifieds:
Career opportunities

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