* You are not really you: British researchers find that most of the cells in the human body actually belong to bacteria, fungi, and viruses living within us. Learning more about how they all interact may help control diseases.
* University of Florida researchers build a living brain, consisting of 25,000 rat neurons linked to a grid of electrodes, which is learning to operate a fighter-jet flight simulator program through a simple electrical feedback process.
* Bones of Tyrannosaurids, meat-eating dinosaurs that lived 65 million to 100 million years ago, are found in northern Canada—the first evidence that such creatures colonized the High Arctic.
* Britain’s Queen Elizabeth II enters the global warming debate, opening a conference on climate change in Berlin and urging Prime Minister Tony Blair to pressure the U.S. government to take more action.
* NASA and IBM battle for the title of world’s fastest supercomputer. IBM’s Blue Gene/L takes the gold, performing 70.72 teraflops, or trillion operations a second; NASA’s Columbia earns silver, at a speed of 51.87 teraflops.
* Impact craters in southeastern Germany are found to be just 2,200 years old. The date coincides with Celtic artifacts in the region and with Roman texts that describe stones falling from the sky.
* Newborn mice fed Prozac grow up to become anxious adults. A drug-induced change in brain development early on may promote depression later in life, Columbia University researchers report.
* The Spitzer Space Telescope detects big clouds of dust kicked up by colliding mountain-size rocks—the building blocks of planets—around 71 nearby stars.
* Biologists identify how insect-borne parasites remain in their hosts. The parasite that carries the tropical disease leishmaniasis latches onto its host, the sand fly, by attaching to a molecular receptor in the fly’s midgut.
* British geologists reconstruct a 425-million-year-old sea spider by slicing a fossil, imaging the shavings, and combining them into a 3-D model. The model may clarify the origins of these creatures.
