Episode Clips

How Many Stars Are There in the Galaxy?

The volunteers find a way to count and visualize the number of stars in the galaxy.

Intelligent Life Exists

Stephen Hawking explains that he believes we’ll encounter aliens in our lifetime.

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Can We Time Travel?

Stephen Hawking sets three challenges to find out if we could be time travelers.

Where Did the Universe Come From?

The group experiments with cars and balloons to understand the origin of the universe.

Why Are We Here?

The volunteers pose an important question about our role in the universe.

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