Saturn's moon Titan has a foggy bottom

 作者:钟馋字     |      日期:2019-03-14 07:10:02
FOG has been spotted on Titan, the first evidence that the Earth isn’t the only body in the solar system to have a hydrological cycle. Yet Titan’s cycle is based on methane. Saturn’s moon Titan is known to have lakes, clouds and river beds, hinting that surface liquid evaporates and returns as rain. But proof is lacking: the lakes might not evaporate, the clouds might not rain,