Between September 2006 and May 2007, the online networking site Facebook doubled its number of visitors to 26 million. Today, it has more than 300 million active users worldwide. Though Facebook is just one tool people use to connect with each other, the myriad of other Web sites such as MySpace and the estimated 2 billion cellphones in use...

In 2006, about 67 percent of Americans played video games using a computer or game console such as PlayStation, Xbox, or Wii. Video games have come a long way since they were developed in the 1970s. In the past, game programs used a computer-like gadget that could be connected to the television. The players would look at the image on the...

Today there are talking toasters, cars that start themselves using voice recognition, and telephones that use voice commands. But those are not the only examples of digital sound. The ubiquitous earbuds and tiny MP3 players show how common it is to listen to digital music. Digital Music: Computers That Make Music examines digital sound's...

With the development of easy-to-use video-editing software, inexpensive camera equipment, and a worldwide audience courtesy of the Internet, creating and watching digital video has become a popular pastime among average computer users. The growth of digital video has changed the way movies and television programs are produced and distributed...

Uncover the magic and truth behind this compelling topic.In more than 480 entries, "The Encyclopedia of Witches, Witchcraft, and Wicca, Third Edition" is an exciting update to one of the landmark references on the subject - by paranormal expert Rosemary Ellen Guiley. This new edition provides unparalleled coverage of witchcraft...

Students with a basic understanding of the environment and concern for its future know the importance of preserving biological diversity. Biodiversity is the variety of living things on Earth or in a specific area. This definition seems simple enough to understand, yet the concept of biodiversity has deeper meanings that challenge even trained...

Conservation refers to the careful and controlled use of natural resources for the purpose of extending the time they are available as well as retaining biodiversity. Conservation does not prevent the loss of plants, trees, land, water, or habitat; it simply slows the rate of degradation of these things. This new book explores aspects of...