Sorry, this episode is not currently available

Do You Know What Time It Is?

Horizon, 2008-2009 Episode 4 of 17

Particle physicist Professor Brian Cox asks, 'What time is it?' It's a simple question and it sounds like it has a simple answer. But do we really know what it is that we're asking?

Brian visits the ancient Mayan pyramids in Mexico where the Maya built temples to time. He finds out that a day is never 24 hours and meets Earth's very own director of time. He journeys to the beginning of time, goes beyond within the realms of string theory, and explores the very limit of time. He discovers that we not only travel through time at the speed of light, but the experience we feel as the passing of time could be an illusion.

59 minutes

Last on

Wed 28 Jan 2015 00:00

iWonder - why do some people get drunk more quickly than others?

iWonder - How can I avoid a hangover?

HorizoniwonderHangover_comp_1024x288.jpg

Find out which of these anti-hangover strategies could actually work

Horizon interactive ebook

hzn_ebook_1024x576.jpg

Celebrate 50 years of Horizon with this free downloadable ebook for tablets.

Added. Check out your playlist Dismiss