The purpose, life, and hazards of the Earth's magnetic field are discussed as they relate to magnetic storms. This includes their impact on animals, auroras, and even compasses. Interactive features are also included in this...

Lost at sea with only your sextant? Use your knowledge of longitude to find your place. The non-shockwave interactive activity makes the concept of longitude concrete.

Great site from PBS on the Roman baths. Includes a very interesting section on what a day at the baths would include through an interactive map. Also has a game in which you construct a bath.

NOVA ferrets out long-forgotten secrets of architects and engineers of the early civilizations. Content focuses on the trebuchets of medieval Europe, the pharaoh's obelisks of ancient Egypt, the moai statues of Easter Island, the...

This companion website of a NOVA program that aired in 1999 features extensive information that focuses on moon research and includes a history of the Apollo missions as well as the science of the moon's origins.

This series of videos about inspirational scientists and engineers looks at their passions both inside and outside the laboratory.

Delve deep into the anatomy of Hurricane Katrina through this interactive produced by PBS. The interactive contains slides, videos and charts that begin with the birth of Katrina. Follow her path as she gains strength and finally falls...

Examine what it is that gives metal its special characteristics and how metal behaves under the stress of heat and outside forces. An engaging interactive feature is offered to here to illustrate this concept.

Compare and contrast the shape and size of a Homo floresiensis brain with the brain of a chimp and a modern human.

Animations of the different phases of cancer, make this a great resource for understanding the development of this disease.

Follow the progression of a malignant tumor, beginning with the first mutation within a cell and ending with metastasis, the colonization of related tumors throughout the body.

Find out what the human body needs to function at its best, and why.

This well-written explanation of relativity includes animations and pictures which may be helpful in understanding a tough topic.

Follow the growth of a carcinoma from initial mutation to widespread metastasis in this feature from the NOVA: "Cancer Warrior" Web site.

Learn about the 74,000 year old eruption of the Toba volcano which produced 670 cubic miles of magma. Compare its' dimensions to other famous eruptions to get an understanding of its enormous dimensions.

Earth's magnetic poles have reversed themselves throughout its long history. Find out what scientists know about these reversals. A geologic time line shows when the reversals occurred.

View several different surface features of Mars as taken by the Mars Global Surveyor. Explanation of each of the geologic features accompanies each photograph.

An introduction to comets, including information on their composition, origin, and importance.

NOVA provides a report on comet Hale-Bopp and comet Hyakutake. Content includes discovery and observational information.

Was there ever life on another planet? Could there be life on another planet again? What makes the Earth support life? This article investigates these questions in depth.

Discusses several pioneers of heart surgery, including Christian Barnard.

Dive into the depths of an active volcano! This PBS site provides an inside look at Nyirgongo, an active volcano along the East African Rift. Take part in this interactive to find out more through vivid images and in depth information.

Explore what generates a jet stream, and discover why they flow from west to east. A link is offered in this site to a helpful animation describing the jet stream process.

Examine the features of Concorde that were designed and engineered for high-altitude, supersonic flight by exploring this detailed, interactive cross section.