This image provided by NASA shows Saturn's largest moon Titan. A new study being released on Thursday, June 14,2012 suggests the presence of a hydrocarbon lake and several ponds near the equator of Titan, a surprise to scientists who thought lakes only existed at the poles. (AP Photo/NASA)

Associated Press
This image provided by NASA shows Saturn's largest moon Titan. A new study being released on Thursday, June 14,2012 suggests the presence of a hydrocarbon lake and several ponds near the equator of Titan, a surprise to scientists who thought lakes only existed at the poles. (AP Photo/NASA)
This image provided by NASA shows Saturn's largest moon Titan. A new study being released on Thursday, June 14,2012 suggests the presence of a hydrocarbon lake and several ponds near the equator of Titan, a surprise to scientists who thought lakes only existed at the poles. (AP Photo/NASA)
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