World Book Explains Video Series
World Book editors and experts on all topics answer questions posed to World Book by its subscribers in the “World Book Explains” feature.
1. A categorized list of questions is under the World Book Explains link on the homepage. The videos also appear in search results and embedded in articles.
2. The videos are in Flash format and require the free Flash plug-in from Adobe to view. (The plug-in is installed on most browsers and can be downloaded from the Adobe site at http://www.adobe.com).