Do You Know What Time It Is?

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, and 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.

Other episodes for this season

How to Kill a Human Being
Episode 1 - How to Kill a Human Being
Total Isolation
Episode 2 - Total Isolation
What on Earth is Wrong With Gravity?
Episode 3 - What on Earth is Wrong Wi...
Is Alcohol Worse than Ecstasy?
Episode 4 - Is Alcohol Worse than Ecs...
How to Make Better Decisions
Episode 5 - How to Make Better Decisi...
How to Live to be 101
Episode 6 - How to Live to be 101
Prof. Regan's Supermarket Secrets
Episode 7 - Prof. Regan's Supermarket...
Are we Alone in the Universe?
Episode 8 - Are we Alone in the Unive...
How Much is Your Dead Body Worth?
Episode 9 - How Much is Your Dead Bod...
How Does Your Memory Work?
Episode 10 - How Does Your Memory Work...
The President's Guide to Science
Episode 11 - The President's Guide to...
How Mad Are You? (1 of 2)
Episode 12 - How Mad Are You? (1 of 2)
How Mad Are You? (2 of 2)
Episode 13 - How Mad Are You? (2 of 2)
Jimmy's GM Food Fight
Episode 14 - Jimmy's GM Food Fight
Do You Know What Time It Is?
Episode 15 - Do You Know What Time It Is?
Allergy Planet
Episode 16 - Allergy Planet
Where's My Robot?
Episode 17 - Where's My Robot?