Bioscience:Natural Communication
It's absolutely necessary for people to exchange information. But humans aren’t the only species who like communicating. Even though they don’t talk， animals communicate and they may use sounds， sight， smell， touch， or taste. Animals use communication for a lot of different reasons — to attract mates， scare away predators， live together and recognize other animals in their group.
- Added：2006
- Country：America
- Duration：15
- Time of update：2011/8/17 16:52:19