How do you browse questions on WikiAnswers according to subject?

First, you must click on the 'WikiAnswers.com' link at the top left hand corner of any given page on WikiAnswers.com. Then, if you look towards the right side of the page, you will see a title that says 'browse our 4,000 categories'. Under that title, there are other main categories. You can click the 'browse our 4,000' categories button to get a view of all the categories.