Scientists have identified a key mechanism for successfully transplanting tissue into the adult central nervous system. This discovery could lead to advances in the transplantation of retina, spinal cord and other central nervous system tissues.

Cancer researchers have developed a method to convert normal human blood cells into "human" leukemia stem cells. The converted cells, when transplanted into special mice that permit the growth of human cells, can replicate the entire disease process from the very moment it begins, published in Science.

A simple scoring system based on five medical factors accurately predicts which patients being considered for gastric bypass surgery would be at highest risk of dying.

Filed under: Wireless

Fresh from showing off its Mobile WiMax wares at the recent 3GSM conference, Samsung's now providing some of its gear to the U.S. Army, who's apparently considering the speedy wireless technology for possible military use. Unsurprisingly, neither party is spilling a whole lot of details on the arrangement, with Samsung only saying that the Army's Communications Electronics Research & Development Engineering Center (or CERDEC) will spend several months evaluating the equipment, measuring the performance of both mobile users and mobile base stations in a military environment, among other undisclosed things. What is fairly clear is how eagerly Samsung will be anticipating the results, as Korea's Hankook newspaper speculates that a deal with the U.S. military could be worth as much as $3 billion for the company.

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Office Depot Featured Gadget: Xbox 360 Platinum System Packs the power to bring games to life!

Appeal court's no-backsies ruling

The fight over a $280m-plus incentive package to lure Dell into North Carolina has entered the state's second-highest court.