An illustrated exploration of a wide array of castles and fortifications throughout the world, from Norman mottes to Maori forts, including how and why they were built and their importance in history.

Presents an illustrated introduction to the science of genetics and DNA, explaining what they are and their function in the human body, and looking at the significance of advances in genetic technology.

Provides information on the largest animals of land, air, and sea.

Explores the variety of ways in which humans communicate, including flags and fires, speech and writing, and through use of electronic media such as television and the internet.

Explore the crime lab with Forensics and discover how detectives use science to solve crimes. From the scene of the crime to a criminal's conviction, discover how the marks of blood, footprints, and fingerprints can lead the police to criminals. Find out how specialists can match trace evidence, such as a single hair found on a victim, to the murderer. Learn how famous crimes were solved and,like a true detective, find out whether it was arson, poison,or...

Explores the killer diseases that have terrified populations throughout history and around the world.