Monday, November 21, 2011

One-Minute Physics: Why past and future are the same

it's obvious that time has a direction: you were younger a decade ago than you are today. But according to the laws of physics, there is no intrinsic difference between the past and the future. In our latest One-Minute Physics animation, guest narrator Sean Carroll, a physicist at the California Institute of Technology in Pasadena, explains why a better understanding of the big bang will help explain the arrow of time.

If you enjoyed this clip, check out the previous episodes in this series, for example find out how far away tomorrow is or see why GPS is just a big clock in space.

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