Nasa's state of the planet in graphics

This collection tells a compelling story of the current state of planet Earth. Instead of telling you in writing, Nasa is saying 'look for yourself' and discover the implications of global warming. This is a great example of information hierarchy - you get the message just by going to the main page. The further you drill down into each section, the more detail is presented to the user, therefor allowing for an exploration of the topic at their own level of detail.