500,000 Years in the Life of a River. The longest river in England, the Thames, has witnessed the entire history of a country and its capital. The Story of the Thames looks at history from the river's perspective, investigating how the life of the nation has affected the river and, in turn, how the river has been viewed by those who live along its length. In doing so it spans 500,000 years (longer than human history) and extends from source to mouth...