Bioscience:It's in the Water
The Earth is unique with having a lot of water on its surface， at least in our solar system. We would be terribly different creatures， if we would be creatures at all， in absence of water. One of the primary chemical features of water is its polar structure. One of the biggest miracles in the universe is the oxygen molecule and its bond angle that it forms with hydrogen.
- Added：2006
- Country：Canada
- Duration：30
- Time of update：2011/8/17 14:06:16