From roaring oceans to trickling streams, water covers seventy percent of our planet! But did you know that less than one percent of Earth's water is usable by humans? Most water on Earth is salt water. It can't be used for drinking, bathing, or growing plants. We need freshwater. Yet about two-thirds of Earth's freshwater is frozen solid at the North and South Poles. And the water we can access-from lakes, rivers, streams, wetlands, or underground...

Learn about new tools for spies.

Discusses the discovery of DNA fingerprinting, the processes involved, its initial use, and its past and present role in forensic identification, conservation biology, and human genetics.

Introduces the life cycle of a pumpkin from the sprouting of a seed through its 16 weeks of growth.

Profiles the work of six individuals whose work shaped the field of forensic science: Alphonse Betrillon, Edward Henry, Karl Landsteiner, Edmond Locard, Clyde Snow, and Alec Jeffreys.

"Discusses the debate over treatment and rights of prisoners of war, including an historical discussion of POWs"--Provided by publisher.