Titan's seas of black Sand Dunes

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Images of Titan sent back from the Huygens lander show seas of black sand not liquid. Concern for fish stocks in the East China Sea as China fills the Three Gorges Dam. A new satellite monitoring project that could help understand how wild fires in Africa contribute to global warming. How a Nobel chemistry-laureate was inspired to find a new and cheaper way of producing the Tamiflu drug, which is being stockpiled against the possibility of a human flu pandemic.