On Our Radar: Vast Ivory Cache Reaches Hong Kong Customs officials in Hong Kong confiscate over 1,200 pieces of elephant tusk smuggled in from Tanzania and Kenya, one of the largest ivory seizures ever in the region. Scientists studying the fault beneath the Spanish city of Lorca report that groundwater extraction for irrigation may have played a role in a deadly 2011 earthquake there. Detailed surface maps indicate that slippage in the fault correlated with places where water was drained out for years. The Russian state oil company Rosneft agrees to buy out BP's 50 percent stake in TNK-BP, a jount oil venture in Russia. BP will in turn become a 20 percent shareholder in Rosneft. Researchers suggest that solar geoengineering -- a strategy to mitigate global warming by reflecting sunlight back into space through the use of aerosols or the creation of low-altitude marine clouds -- could be tailored to specific regions to avoid unwanted effects. Harvard University Sting moves a concert in the Philippines to a different location after environmental groups protest plans by a stadium owner to uproot 182 trees. The Guardian