A Brief History of Time was a best-seller for four years. Hawking believes its success is down to giving people access to great philosophical questions, but acknowledges human interest boosted sales.

In this story we'll look at overall trends in the history of PC viruses ... A host of imitators began to spread as well. For a time in the mid-90s it seemed as if every other e-mail message ...

The Rogues Gallery of Time Lords proves that the Doctor's people had a history of villainy as well as virtue. And although he often speaks of Gallifrey with great fondness, his relationship with ...