The cat's out of the bag (or off the leash, in this case) regarding the expansion of the universe. In this intriguing episode, the narrator explains that space is expanding, not the objects within it. He also tells how expansion overcomes the gravitational pull between objects. Short, but sweet, the topic is an exciting addition to your space science or physics lectures.

Concepts

gravitational force, gravity, electromagnetism

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Additional Tags

expansion of the universe, gravitational pull, electromagnetism, gravity, distance in space, science

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Classroom Considerations

• This video is hosted on YouTube

Pros

• Explores a fascinating earth science question
• Engaging and high-quality animation and narration

Cons

• None