Saturn's moon Titan has long held a special fascination to astrobiologists. Its thick atmosphere is largely composed of nitrogen and organic molecules which are the building blocks of life. At a frigid -178 C (-289 F), however, it's much too cold to support life. But there could be some habitable locations on Titan, you just have to look carefully. Methane clouds around Titan indicate that it probably has an active cycle similar to the water cycle here on Earth. There could be areas where get warm enough on Titan for life to gain a foothold.