It is well known that Earth is unique as the only planet in the solar sytem which can sustain life. But in other respects, our planet may not be quite as unusually as is often thought. Astronomers studying Titan, Saturn's largest moon, have described it as 'a weirdly Earth-like place' when it comes to geology. Titan
boasts landscapes shaped by the flow of rivers - though they are rivers of liquid methane, not of water. And, like Earth, the surface of Titan is surprisingly free of craters, implying that geological activity is constantly reshaping the moon, as also happens here. Source: The Coming Crisis
