1.  However, with the help of computer science, more and more scientists are using computers to help them analyse the dates.

2.  Astronomy scientists use it to find the other planets which might have civilization on them.

3.  In other words, two definitely different subjects, say, chemistry and literature, also share the same means of resolving a problem, like the means of constructing models, in the field of literature, critics constructs models of people's characteristic to analyze an author's depicting a special figure's mental activities while in chemistry, scientists use models of rod and ball to explain the structure of molecule.

4.  For example, scientists use physical methods to analyze chemical problems, mathematicians calculate with the help of computers and students majoring in history understand the causes of some historical events via their geography knowledge.

5.  Scientists can use the finding to create and develop some inventions.

6.  There are still quite many diseases left to be cured and it's necessary for scientists to use lab rats for medical treatment before the medicines are put into use while working on children is difficult, unethical and people wouldn't want you to test on their children.

7.  Compared with human tests, it's more easy for scientists to use animals in the experiments which can surely improve the efficiency.

8.  Then on the other hand, scientists use it to analyse datum, to control sate elite or machine, for example.

9.  On one hand, scientific experiments is essential in scientific research, but scientists can't use real person to do the dangerous testing.

10.  Since animals share many features with humans, scientists use animals to test the safety and effectiveness of newly developed drugs before pilot testing on small groups of patients.