In three billion years the sun will expend its hydrogen and eight minutes later all life on Earth, such as it may be, will end forever. The sun will go through other transformations, first grinding the Earth into dust before expanding and swallowing the debris. Eventually shrinking and collapsing entirely taking all trace of what was once the Earth with it who knows where. From the birth of the sun this will have taken about fifteen billion years, of which four and a half billion have passed. In all this time the fact will remain; the village of Bonnybridge once had a train station, and it will never do so again.