Why do classification systems change over time?

1. Scientists find new evidence in their studies

2. Scientists use old methods of classifications

3. Scientists repeat experiments and find no changes

4. Scientists find similar evidence to previous work

The classification systems change over time because scientists find new evidence in their studies.

The classification systems change over time because scientists find new evidence in their studies. Scientific study and research are always ongoing, when scientists found new evidence about a theory that is already in existence, this theory will be upadated according to the new discovery that has just been discover.