Titan is a moon of Saturn, most recently explored by the Cassini/Huygens probes. Titan is of huge interest to scientists, as the conditions in its atmosphere and on its surface bear a striking similarity to those of early Earth. It is thought that there is a realistic possibility that forms of primitive life could develop - or may already have developed - on the surface or in the oceans of Titan. As a result, there are plans to send further probes...