Page last updated at 07:03 GMT, Friday, 19 September 2008 08:03 UK
Corpus clock marks march of time
Professor Stephen Hawking will unveil a new clock at Corpus Christi College, Cambridge. Its inventor Dr John Taylor says the clock offers a "radical new way" of telling the time. Science correspondent Tom Feilden reports from below the clock.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.