Topic trees make it easy to view a topic from many points of view. Different sentences are shown in a tree and split into branches when the wording is different.

The bigger the font, the more often the words are kept, which allows you to see what's most important about a topic. It also lets you to easily find previous revisions of Wikipedia articles based on the language that they used. If you click on the little article icons, it'll take you the revision that contained that phrase.

Some examples:

• Terrorism is ...
• Germany's involvement in the European Union
• Cricket is ...
• England's involvement in Cricket

This tool lets you see at a glance the world's tallest buildings , major riots, disasters even UFO sightings.

The map and the article are linked throughout. Click on a map marker and it jumps to that part of the article. Click on an article marker and it will show you that location on the map.

See for example our tourism fact map. If we click on Bangkok (Q), for example, we can see the relevant part of the article and learn that it's the third most visited city in the world. Or zooming into Europe and clicking on Nice, Wikipedia tells us it was one of the first and best established resorts in the French Riveria.

History buffs may like the causes of World War II, the history of slavery and the history of Western civilisation.