In this video segment adapted from ZOOM, the cast builds a suspension bridge from a couple of chairs, some cardboard, and rope.

In this interactive activity from ChemThink, learn how ionic bonds are formed and how an ionic bond structure is represented by its formula.

Members of the Islamic Center of Washington, DC discuss the religious and spiritual significance of Ramadan and the celebration that concludes it, Eid al-Fitr, in this video segment from Religion & Ethics Newsweekly.

In this video segment adapted from NOVA scienceNOW, follow scientists in their quest to understand how stable elements are made and how to create the elusive element 114.

This video, adapted from material provided by the ECHO partners, provides a portrait of IŰ__ŒóíŠupiaq whaling as a community activity, as told through the story of one hunt.

This video adapted from Texas Parks and Wildlife Department describes how humans are helping restore safe nesting grounds for the critically endangered Kemp's ridley sea turtle to ensure its successful repopulation.

In this video from Science City, Kerri-Ann Richard, an environmental engineer, describes how she became interested in the field and why it is important to clean up the environment by removing contaminants from soil and ground water.

Follow along in this video segment from ZOOM as 13-year-old Nick explains how he came up with a design, tested materials, and constructed his own cardboard chair.

In this video segment from ZOOM, Andrew demonstrates how his invention helps him get ready for his paper route.

Tired of bending down to pick up those runaway tennis balls? Leang can help you out with his handy invention in this video segment from ZOOM.

In this video segment from ZOOM, Lauren explains how she invented a way to make her lacrosse stick fit in her backpack.

ZOOM guest Amy wants to be a meteorologist and volunteers at a weather observatory. In this adapted video segment, she shows us instruments used to predict the weather and describes how air pressure affects weather patterns.

Visit with Andres during fiesta time at Paracho Michoacan, Mexico's "guitar town". As Andres shows in this video segment from ZOOM, guitar music goes beyond simple sound vibrations.

In this video segment adapted from the Massachusetts Institute of Technology, researchers in the Artificial Intelligence Laboratory working to engineer smarter robots are now building a machine that interacts socially with people.

In this segment adapted from ZOOM, cast members use computers to program a robot in preparation for the FIRST LEGO League Challenge tournament. Despite meticulous planning and programming by its designers, an autonomous robot can encounter unexpected challenges. This is true for both LEGOŰ_í_Œ_ robots and Martian rovers. In this video segment adapted from ZOOM, cast members enter the FIRST LEGOŰ_í_Œ_ League Challenge tournament and work as a team to program their LEGOŰ_í_Œ_ robot to navigate a complex obstacle course. Grades 3-8.

This Evolution video segment describes how the famous track fossils known as the Laetoli footprints might have been formed and what they can reveal about the creatures who left them.

In this Nature video, follow geologists as they retrieve samples from a fresh batch of Kilauea's molten lava.

In this video profile produced for Teachers' Domain, meet La'ona DeWilde, an environmental biologist who integrates her Athabascan heritage and her Western scientific training to help remote Alaskan villages address environmental issues.

In this video from the Encyclopedia of Physics Demonstrations, observe how a laser beam is trapped in a water jet because the light reflects against the surface of the water.

In this video segment adapted from NOVA, scientist Mike Garcia draws lava samples at the foot of the active Kilauea volcano to see if it is related to its neighboring volcano, Mauna Loa.