String Theory: A New Picture of Gravity

This video segment from NOVA describes the general theory of relativity and the theory of electromagnetism.

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String Theory: A Strange New World

This video segment from NOVA chronicles Einstein's quest to unify the forces of electromagnetism and gravity.

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String Theory: Newton's Embarrassing Secret

This video segment from NOVA chronicles Newton's theory of gravity and Einstein's discovery that contradicted it.

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Thank Goodness for Gravity

In this video adapted from the Lexington, KY Public Library, a young boy learns about Earth’s rotation from a librarian, a pendulum, and Leon Foucault.

Trash Bag Kites

In this video from Curious George, children fly kites they have made from trash bags and explore the forces of pushes, pulls, and gravity.

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Traveling Through Time

This video excerpt from NOVA’s "The Fabric of the Cosmos: The Illusion of Time" explains gravity’s pull on time, and how time travel may be possible in the future. However, this kind of time travel might not be exactly like Hollywood’s depiction.

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Virtual Pendulum

This interactive activity from ZOOM offers a chance to experiment with a virtual pendulum and to see how it can be influenced by a variety of factors.

What Is "Weightlessness"?

This video segment, adapted from ZOOM, shows how dropping a cup of water can both demonstrate gravity and create "weightlessness" here on Earth.

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Your Weight on Other Worlds

This interactive resource from the Exploratorium calculates your weight on other bodies in our solar system and offers an explanation of mass and weight and the relationship between gravity, mass, and distance.