Describe The Periodic Table of Elements, identify the elements that make a firework work and examine the contribution of each element to the total fireworks effect.

NOVA presents a slide show of orchids with brief descriptions of each of the 15 pictures. See the beauty of each orchid, who it was named for and where it lives.

While most people believe that global warming is a reality, Marlo Lewis, Jr. is a skeptic. Lewis is with the Competitive Enterprise Institute in Washington, D.C. In this interview, he questions the California initiative to lower...

Explore some of the explanations for the ice ages that have occurred in the Earth's history. The explanations are all related to conditions caused by plate tectonics.

View a slide show of the seven tallest peaks found on seven different continents. An interactive map will show you the location of each of the mountains. You can also get information on elevation, the name's meaning, and the first people...

Retrace the development of our knowledge of nucleic acids by viewing pictures of nucleic acids (both DNA and RNA) taken in 1952, 1973, 1979, 1980, 1984 and 2001.

Learn about the tools and technologies that Greek stonemasons used to cut and shape blocks of marble destined for the Parthenon. Also learn about how the stone was transported to the building site and set into place.

Wonder what the iceman ate just hours before he died. This site tells you and explains how the scientist came to figure this out. Includes photos.

Peter Tyson explains the reasons he finds amber fossils so interesting. Read his descriptions and catch his passion for these fossils.

Investigate the series of events that led to the fossilization of an ancient bee. You'll retrace the events that moved the amber fossil to its' final resting place, a Dominican amber mine.

Using an interactive map, find out where amber fossils are located around the world. Twelve different locations are represented on the map.

News article relating the history of Kennewick Man and the expectations of scientific analysis of the remains. Links offer additional news releases regarding legal issues preventing research.

Find out what causes the aurora borealis. You can view some interesting photographs of the aurora in action.

Play an interactive game where you can match modern dog breeds with the country in which they originated.

After introducing you to the cascade process for reaching absolute zero, this interactive will challenge you to choose the right combination of gases to liquify oxygen.

A timeline of money from 9000 B.C. to the present day that explains the types of money being used at various times in history.

Take an interactive, narrated tour through some of the most stunning and outlandish images and data sent back by the two Mars rovers Spirit and Opportunity. Consider the many reasons why scientists are certain that Mars had a wet past.

Compare and contrast different types of lightning bolts. A substantial amount of information is provided here including pictures with descriptions for each type of lightning bolt. NOTE: The interactive is no longer available; Click on...

Colorful, easy-to-understand slideshow on gene switches. These embryonic gene switches play a powerful, predominant role in the animal's basic body plan and other early functions. 8/1/2007

A timeline that allows students to explore humans' pursuit of a longer and healthier life. Includes major events from fourteenth through the twentieth centuries.

A look at three stages of childbirth--active labor, delivery, and post-delivery--complete with simple diagrams as well as notes on related risks, including fistulas and excessive bleeding, and treatments.

This interactive game has students apply skills in estimation, measurement, and basic addition using pearls. Students are asked to estimate the number of pearls in a treasure chest by making predictions and using number sense. The skills...

This resource explains how ice cores are used to analyze past events like air pollution, volcanic activity, climate changes, and radioactivity.

One of the major causes of species extinction is the introduction of alien species. Information about ten different invasive species is presented. Find out how well you know the information by matching alien species with the effects...