Explore the science behind hot air balloons. Learn what makes them fly. Read about the history of ballooning. Engage in an interview with Steve Fossett, hot air balloon pilot. There is also a virtual flight which requires Shockwave.

PBS site provides links to understanding how glacier movement can reveal the effects of global warming. Contains links to view satellite images of glaciers from space, a video clip and slide show about a science expedition to a glacier...

PBS site explores the T. rex and its enormous size. Contains links to a video broadcast segment, a section on "Growing Up T. Rex," "Name That Sound" as well as a section on "Ask the Expert."

A companion site to Nova's film that examines "human populations and environments." Find some fascinating facts in the interactive slide shows "Human Numbers Through Time," and "Global Trends Quiz."

Explore the mysterious Easter Island as a team of archaeologists attempts to recreate the process used to construct the monolithic Moai statues.

Discover why the floodwalls in New Orleans failed when they should have held. Consider the alarming forecast of more intense storms in the coming years, and review preparedness measures underway to protect New Orleans from future...

James McLurkin, leading robot designer, talks about robot "swarms" and his life's work with robots. [10:00]

With this video resource, viewers follow a research biologist into the swamp to find out why leeches have such a bad reputation, and what role they play in today's environment and medical field. [11:01]

Learn about how Rice Paddys are built and formed. This site has a video and description of the process.

If an asteroid was to hit the earth what would be the effect? The result would be based on its speed, trajectory and most importantly, its size. This site provides a feature that allows you to learn the effects of these variables and...

Explore Janusz Skulski's drawings of the battleship Yamato, and discover what made the ship both seemingly unsinkable and highly vulnerable to attack.

This site features a captivating video that introduces RNAi. Discover how this modest little molecule has impressive medical promise.

PBS site explores mirror neurons and why humans get so worked up watching other people. Contains links to a video segment on the discovery and significance of mirror neurons, a research update involving a study using pro dancers, an...

PBS sites examines the 1918 flu virus that killed 50 million people.

PBS site invites users to watch a video segment on "longevity genes." Will they help us to live longer lives?

The companion site that accompanies the NOVA program on salvaging Zeugma, an ancient Roman town on the banks of the Euphrates. It shows how archaeologists rescued many artifacts from a dam-building project.

This NOVA site has information on the past and the future of the Northwest Passage. The first article discusses the effect of global warming and the possibility of an ice-free shipping lane through the Northwest Passage.

View NOVA's award winning stories online with close captioning.

In this five-part audio slide show Russell Potter talks about what has been found from the ill-fated Franklin expedition. He also puts the expedition in historical context with drawings and newspaper articles from the time.

Curious about the origin of rice, how it is raised, and the effect it has on cultures around the world? This PBS article is kid friendly, and brief. There is also a video of rice terraces at Japan's Lake Biwa as a metamorphosis over the...

PBS explores the new tools available to make it easier to predict a hurricane's intensity. Contains links to a quiz that will separate the "hurricane know-it-alls" from the rest of us as well as a section entitled: "How do they know that?"

PBS site provides information as to what stem cells are, what they do and how we find a balance between hope for cures and respect for life. Contains links to stem cell research, the cloning process as well as politics of stem cells.

Watch this video to learn PBS NOVA: how scientists calculate the probability of intelligent life forms on other planets. Listen to experts' opinions on this topic and learn what scientists are doing to search for extraterrestrials. [51:58]

Learn about animal behavior, communication, and intelligence by taking a look at separate case studies of a dolphin, an octopus, a dog, and a parrot. [55:13]