Physics:Newton's Apple（20）
On this episode of Newton's Apple， we shall find answers to the questions: First， I am a biggest fan of all Olympic Winter Sports， especially ski jumping. How do ski jumpers go so far? Second， why do bees sting? To find the answer to this question， we have to be at the Bee Biology Facility of the University of California. And last， what is ruminant? They have a special digestive system.
- Added：2006
- Country：America
- Duration：30
- Time of update：2011/8/16 10:26:23