Physics:The Mother of All Collisions
Somewhere in the world there is a car accident every second of every day. In Britain alone， there are tens of thousands of crashes a year. Many of these accidents break the laws of the land， but they all obey the laws of nature. It's science that can not only help save your life， but also unlock the secrets of the universe. This is a story about the law of collisions.
- Added：2006
- Country：Britain
- Duration：30
- Time of update：2011/8/15 17:07:56