This is a general encyclopedia. Your first search should use this database!
This is a general science database.
This is a biological science database.
This is a general reference database. It contains information about many topics, including science topics.
This database contains many reference books about history of the world. Your theory may be included here too.
Use this database to find information about any people associated with your theory.
How to find keywords to make your research easier:
Some topics are easy to search for by inserting just the topic name into a search engine. However, most topics need additional keywords to help you find information.
Search for keywords while you are reading by looking for and recording:
use your keyword list to search for more information about your topic.
Click on the screencast to see an example about how to search for keywords:
The Four Element Theory of Matter (Earth, Fire, Air, Water)
Miasma Theory of Disease
Vitalism (Vital Force Theory)
Stress Theory of Ulcer Formation
Out of Asia Theory of Human Origin
Four Humors Theory of "Medicine"