Physics:Newton's Apple（23）
On this episode of Newton's Apple， we shall find answers to the questions: First， we will track mosquitoes with satellites. Second， how do clocks keep time? Eileen went looking for answers in one of the places in the world famous for time-keeping: Switzerland. And last， a lot of frogs around the world are not croaking in a good way. What kind of deformities do they have?
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/16 10:27:56