The World Health Organization believes the spread of radiation from a quake-crippled nuclear plant in Japan remains limited and appears to pose no immediate risk to health,theWHO'sChina representative said on Friday.
Japan's nuclear accident exposes the dilemma of whether to build power plants on tsunami-prone coasts or inland sites where water supplies are unreliable, a problem likely to be aggravated by climate change, experts say.
Many of the world's 442 nuclear power reactors are by the sea, rather than by lakes or rivers, to ensure vast water supplies for cooling fuel rods in emergencies like that at the Fukushima plant on Japan's east coast.
The brain is a black box. A complex circuitry of neurons fires information through channels, much like the inner workings of a computer chip. But while computer processors are regimented with the deft economy of an assembly line, neural circuits are impenetrable masses. Think tumbleweed.
Researchers in Harvard Medical School's Department of Neurobiology have developed a technique for unraveling these masses. Through a combination of microscopy platforms, researchers can crawl through the individual connections composing a neural network, much as Google crawls Web links