Volcanoes are one of the most dynamic, powerful, and visible forces on Earth. This interactive resource adapted from the National Park Service uses images to describe different types and parts of volcanoes, volcanic rocks, magma, and...

This interactive resource from Harvard Smithsonian Center for Astrophysics uses images and activities to understand the scope and scale of our universe. Featured are technologies used by generations of explorers.

See what it is like to walk on the moon by viewing this collection of QuickTime images from NOVA Online. Stunning 360-degree panoramas from each of the six successful Apollo moon landings are featured.

In this video segment adapted from NOVA, dramatic footage of avalanches and animations of ice crystals illustrate how a layer of weakly-bonded snow can contribute to a devastating avalanche. [4:03]

This interactive resource adapted from NASA describes the different temperature, precipitation, and vegetation patterns in seven biomes: coniferous forest, temperate deciduous forest, desert, grassland, rainforest, shrubland, and tundra.

This video segment adapted from NOVA explains the difference between weather and climate and features groundbreaking analysis revealing that Earth's climate has changed much faster than previously believed. [5:48]

In this interactive activity from NOVA Online you can move an air mass over a mountain and see how several distinct microclimates are created.

This interactive activity from NOVA Online uses animation and graphics to offer a detailed explanation of the jet stream. A thorough account is given of the role played by the Sun's heat and Earth's shape and rotation, among other factors.

This flyer from the 1962 Birmingham selective buying campaign encourages African Americans to boycott discriminatory businesses; from the Birmingham Civil Rights Institute.

These materials document the goals and activities of the Alabama Christian Movement for Human Rights; from the Birmingham Civil Rights Institute.

In this transcript of an interview for Eyes on the Prize, Harry and Eliza Briggs describe their experience in the first school desegregation case, Briggs v. Elliott.

This audio excerpt from Bayard Rustin's 1967 "Freedom Budget" speech outlines a nine-year plan to end poverty in America.

In this transcript of an interview recorded for Eyes on the Prize, Stokely Carmichael describes SNCC organizing campaigns and his views on "Black Power."

In this transcript of an interview for Eyes on the Prize, psychologist Kenneth Clark describes his research that illustrated the impact of racism on African American children.

These materials document the philosophy and activities of the Concerned White Citizens of Alabama, who fought for racial equality and voting rights for African Americans; from the Birmingham Civil Rights Institute.

In this oral history from the Birmingham Civil Rights Institute, Frank Dukes describes his role in the 1962 boycott of discriminatory stores and businesses.