How did the Universe begin? Where might it end? How do we and our small planet fit into the scheme of things? And what on earth, or rather in space, has 'dark energy' got to do with it?

In the Royal Institution Christmas Lectures 2003, broadcast on Channel 4, Dr Monica Grady takes us on a journey from the beginning of time to the outer reaches of the Universe and back home again. This website offers extracts from the special Channel 4 booklet, a couple of fun games, snapshots of the Universe, and details of where to find out more.