4Chan Founder called in to testify in case of Sarah Palin's hacker. Science Story | Thorium, the Next Nuclear Fuel? Full List - The Top 10 Everything of 2009. The Physics of Space Battles - Space battle - Gizmodo. 8 weird ways to save the Earth - Cloud whitening (1) - CNNMoney. How it works: The idea here is to use satellite-guided sailing ships to crisscross the oceans, constantly spewing a fine stream of sea mist into the clouds. Turns out particles, in this case the salt in the sea mist, will cause clouds to become denser, reflecting more sunlight back into space and keeping the planet cooler.
The novel ship design actually dates back nearly a century, when the German inventor Anton Flettner built one that crossed the Atlantic. The mist towers are hollow and rotate in the wind, acting as sails. It can cross the Atlantic faster than a conventional sail boat and do so without a crew. The power for the mist pumps is generated by the turbine under the hull. Each ship would cost $2 or $3 million, making the entire program cost just a few billion dollars. About 1500 ships would be needed to maintain current temperatures, according to John Latham, a scientist at the National Center for Atmospheric Research.
NEXT: Space-based Frisbee deflectors.