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April 30, 2004

A Busy Protein at the Cell's Center

It takes gangs of proteins to regulate cell reproduction, repair DNA, and build and constantly remodel the chromatin in the cell nucleus. One of the most active of the bunch is the protein Asf1, found in virtually all eukaryotic cells. Scientists are beginning to learn how Asf1 does its many important jobs.
Windows that Switch off the Electricity

The latest in dynamic window technology is the transition-metal switchable mirror, whose glass coating can shift back and forth from transparent to almost completely reflective. Switchable mirrors save energy by letting in just enough light and heat; now researchers have found a way to make them efficiently and economically.
  Feature Stories  
Scientists are investigating ways to turn garbage- preserving landfills into energy-efficient bioreactors.
Learning to light the interiors of the future with pinpoint LEDs.
  Robotic crystallography comes to the Advanced Light Source.  
  Polarimetry measures the remnants of an unusual supernova.  
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  A Special Section on Global Warming: Strategies for Dealing with Excess Carbon Underground, in the Oceans, and on Land  
The Eyes of Texas Look Underground

Texans test one of the most promising technologies for storing excess carbon produced by humans: sequestering liquid carbon dioxide in deep geological formations.

Robots Roam the Seas

Deep-diving robotic floats are studying the carbon cycle in the world's oceans for months at a time, reporting what they learn by satellite.

Heating up the Land Where we Live

Land use doesn't just affect the rate at which the globe is warming. The worst effects of a hotter planet will be felt in our own backyards.