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September 23, 2005
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Old Bones

Older people are more prone to bone fractures than younger ones, and the reason isn't just loss of bone mass: quality counts as much as quantity. State-of-the-art imaging and detailed mechanical analysis have shown that aging bones lose resistance to the formation and growth of cracks that lead to breaks.
  In Series  
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The third and final installment of a series on the status of breast cancer research at Berkeley Lab, drawing on presentations made at DOD's Era of Hope research conference in Philadelphia. This installment: the good and the bad about senescence.
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  A Science@Berkeley Lab Interview: Evan Mills  
Is insurance paying the cost of global warming? Evan Mills discusses the steadily rising cost to insurance companies and their customers of extreme disasters like hurricanes and wildfires. Many scientists believe the underlying cause is climate change.
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Slicing the Beams

By laser-slicing beams of x-rays so that each pulse is only a few millionths of a billionth of a second long, researchers at the Advanced Light Source have performed spectroscopy on a material that changes from an insulator to a conductor, and from transparency to reflectivity, in 80 femtoseconds flat.
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The Game of Go

China's gross domestic product quadrupled between 1980 and 2000; by 2025 its economy may double again. Strong energy-efficiency policies helped keep energy use growing at only half the rate of the economy, but China is already the world's second largest consumer of oil. Can conservation keep up with the pace?