Connectipedia (and other wagn sites) uses a structure called cards, rather than pages or articles. Cards can be combined and stand alone, creating greater abilities to combine and connect information. You can read more about wagn's card feature here: http://wagn.org/wagn/Introduction
 
When there is a little triangle to the left of a card's name, clicking the name (or the triangle) opens and closes the card. This lets us fit lots of cards onto a single page, and allows us to organize information in many different ways. When you scroll over the header of a card, you will see a diagonal arrow on the right-hand side of the name. Clicking this will expand the card to be the main page you are viewing.