The ideas
Follow one idea through many nights.
Topics keep things tidy: ocean here, space there. Ideas do something better. Gravity is the same idea whether it is pulling the sea, holding a hippo on a riverbed, or bending a spacecraft around the Moon. Follow one and the whole library starts to connect.
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10 episodes
Gravity
The pull that holds everything
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10 episodes
Light
How the dark gets brightened
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6 episodes
Sound and echoes
Ripples you can hear
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8 episodes
Water
The traveler that never runs out
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8 episodes
Rest
How living things stop
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7 episodes
Finding the way
Maps nobody was taught
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6 episodes
Patterns
What order looks like up close
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6 episodes
Air and pressure
The ocean we live at the bottom of
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7 episodes
Heat and energy
Where the warmth comes from
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8 episodes
Deep time
Things that take longer than a life
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6 episodes
The senses
How the world gets in
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6 episodes
Force and machines
Trading speed for strength
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7 episodes
Living bodies
Built, running, and repairing
Prefer to start with a question? The Curiosity Index lists every question the show answers.