It NASA sent one of its probes, Cassini to observe Saturn's biggest moon, Titan. According to two of its reports, there are indications that life exists in Titan. Organic chemicals had been detected and its surface is covered with liquid. But the liquid is not water. It is methane. Scientists presume that if there is life there, it will be likely based from methane, not water like ours here on Earth.
Cassini, the probe, sent Earth two reports:
Apparently, each one of the evidence presented may not mean much on their own but when they exist together, it is a strong indication for life to exist.