Atoms: The Space Between

This video segment adapted from A Science Odyssey takes a look at the scale of the atom and the tremendous amount of space between the electrons and the nucleus. If all this empty space exists in matter, how can any substance be solid?

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Chernobyl: What Really Happened?

This text excerpted from Richard Rhodes' book, Nuclear Renewal and reprinted on the FRONTLINE Web site examines the causes of the Chernobyl accident.

Einstein: How Smart Was He?

This essay from the NOVA Web site explores the impact Einstein made on physics and most everything we know about the cosmos.

Einstein's Special Theory of Relativity

What happens when you approach the speed of light? This video segment adapted from NOVA follows one of Albert Einstein's thought experiments and his quest to find the answer.

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Everyday Radiation

How much radiation are we exposed to every day? Find out in this video segment adapted from FRONTLINE.

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FAQs About Nuclear Power

Nuclear physicist, Dr. Charles Till, answers questions about nuclear power in this interview from the FRONTLINE Web site.

Gravity and the Expanding Universe

This video segment, adapted from NOVA, traces the evolving history of theories about gravity and a force that may oppose it, along with our understanding of the impact of both of these forces on our expanding universe.

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Nuclear Reaction: Fission

This video segment adapted from FRONTLINE looks at nuclear fission as an energy source that can be used to generate electricity.

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Nuclear Reaction: Meltdown

What happens when a nuclear reactor overheats? This video segment adapted from FRONTLINE looks at the nuclear reactor meltdown at Chernobyl, the worst accident of its kind.

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Nuclear Reaction: Plutonium

One by-product of nuclear fission is plutonium. This video segment adapted from FRONTLINE takes a look at this toxic element.

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Nuclear Reaction: Searching for Safety

This text excerpted from Beyond Engineering: How Society Shapes Technology by Robert Pool and reprinted on the FRONTLINE Web site looks at the impact of nuclear power.

Nuclear Reaction: Three Mile Island

This video segment adapted from AMERICAN EXPERIENCE examines the worst nuclear accident in U.S. history.

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Quantum Mechanics

Are electrons particles or waves? This video segment adapted from A Science Odyssey looks at the intense debate surrounding the understanding of electron configuration.

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Quarks: Inside the Atom

This video segment adapted from NOVA shows how the particle accelerator helped physicists find parts of the atom even smaller than protons and neutrons.

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Relativity and the Cosmos

This illustrated essay from the NOVA Web site introduces the basic concepts of Einstein's General Theory of Relativity and what we know about cosmology as a result.

Snowflake Physics

Explore the science behind snowflake formation by examining water molecule structure and other conditions that affect snowflake growth in this interactive activity adapted from SnowCrystals.com.

Speed of Light: Time Traveler

This interactive game from the NOVA Web site explores what happens to time as a traveler approaches the speed of light.

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: Elementary Particles

This illustrated essay from the NOVA Web site looks at the fundamental forces and particles that make up all matter.

String Theory: Gravity - The Odd Man Out

This video segment from NOVA describes the discovery in the 1930s of two forces in addition to electromagnetism: the strong nuclear force and the weak nuclear force.

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