The age of the universe and its vast number of stars suggests that extraterrestrial life should be common. If that’s the case, then where is everyone? In this infographic we explore some possibilities.
Fingal’s Cave, Inner Hebrides, Scotland. "Fingal's Cave is a sea cave on the uninhabited island of Staffa, in the Inner Hebrides of Scotland, part of a National Nature Reserve owned by the National Trust for Scotland" via Wikipedia.