To learn something new every time you open your web browser, you can set your browser home page to random Wikipedia page.
Open Safari Preferences > General and enter the URL: http://en.wikipedia.org/wiki/Special:Random into the Homepage field. Setup “New windows open with” and “New tabs open with” to point to Homepage. You will get a random Wikipedia page when you next open a new window or tab.
You can also narrow down the random selection from within a given category. Use the URL https://en.wikipedia.org/wiki/Special:RandomInCategory/ follow by the name of the category.
For example, to get a random article in the Computer Science category, the URL is
To get a random article in the Personal Finance category, the URL is
Click this link https://en.wikipedia.org/wiki/Special:Categories to see the list of categories available.