04/04/2006 07:00:00
Robert Tindol
Physicists from the California Institute of Technology and an international collaboration of scientists at the Department of Energy's Fermi National Accelerator Laboratory have observed the disappearance of muon neutrinos traveling from the lab's site in Illinois to a particle detector in Minnesota. The observation is consistent with an effect known as neutrino oscillation, in which neutrinos change from one kind to another.
 
04/03/2006 07:00:00
Robert Tindol
One of the quests of modern biologists is to understand how cells talk to each other in order to determine where to form major organs. An international team of biologists has solved a part of this puzzle by combining state-of-the-art imaging and mathematical modeling to reveal how plants go about positioning their leaves and flowers.
 
03/30/2006 08:00:00
Robert Tindol
A mere three months after the giant Sumatra-Andaman earthquake and tsunami of December 2004, tragedy struck again when another great earthquake shook the area just to the south, killing over 2,000 Indonesians. Although technically an aftershock of the 2004 event, the 8.7-magnitude Nias-Simeulue earthquake just over a year ago was itself one of the most powerful earthquakes ever recorded. Only six others have had greater magnitudes.
 
03/29/2006 08:00:00
Robert Tindol
By studying epileptic patients awaiting brain surgery, neuroscientists for the first time have located single neurons that are involved in recognizing whether a stimulus is new or old. The discovery demonstrates that the human brain not only has neurons for processing new information never seen before, but also neurons to recognize old information that has been seen just once.
 
03/15/2006 08:00:00
Robert Tindol
Astronomers have discovered a narrow stream of stars extending at least 45 degrees across the northern sky. The stream is about 76,000 light-years distant from Earth and forms a giant arc over the disk of the Milky Way galaxy.
 
03/15/2006 08:00:00
Robert Tindol
Most everyone knows that the term "dyslexia" refers to people who can't keep words and letters straight. A rarer term is "dyscalculia," which describes someone who is virtually unable to deal with numbers, much less do complicated math.
 
03/15/2006 08:00:00
Robert Tindol
In a new development in nanotechnology, a researcher at the California Institute of Technology has devised a way of weaving DNA strands into any desired two-dimensional shape or figure, which he calls "DNA origami."
 
03/09/2006 08:00:00
Robert Tindol
Biologists in recent years have identified every individual gene in the genomes of several organisms. While this has been quite an accomplishment in itself, the further goal of figuring out how these genes interact is truly daunting.
 
03/09/2006 08:00:00
Robert Tindol
Molecular biologists have known for some time that there is a so-called checkpoint control mechanism that keeps our cells from dividing until they have copied all the DNA in their genetic code. Similar mechanisms prevent cells from dividing with damaged DNA, which forms, for example, in one's skin after a sunburn. Without such genetic fidelity mechanisms, cells would divide with missing or defective genes.
 
03/02/2006 08:00:00
Robert Tindol
Your emotions can easily be read by others when you blush—at least by others familiar with your skin color. What's more, the blood rushing out of your face when you're terrified is just as telling. And when it comes to our evolutionary cousins the chimpanzees, they not only can see color changes in each other's faces, but in each other's rumps as well.
 

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