Uranus and Neptune | Image from "Nova: The Planets" Ice Worlds

The Planets: Ice Worlds

In the far reaches of the solar system, Uranus and Neptune dazzle with unexpected rings, supersonic winds and dozens of moons. And NASA's New Horizons gets a stunning up-close view of Pluto before venturing deep into the Kuiper Belt.

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A to Z: How Writing Changed The World

Just as handwritten records changed how societies work, the printing press transformed the spread of information, igniting the Industrial Revolution. How did technologies -- from pen to paper to printing press -- make it all possible?

  • 2020-10-02T05:00:00-07:00
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  • 2020-10-04T15:00:00-07:00
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  • 2020-10-04T18:00:00-07:00
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Animal Espionage

Camera traps and drones are revolutionizing the study of wildlife by providing an up-close look at animals without disturbing them. See how these technologies are helping us understand everything from mysterious whale behavior to tiger migration.

  • 2020-10-09T05:00:00-07:00
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  • 2020-10-11T15:00:00-07:00
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  • 2020-10-11T18:00:00-07:00
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Nature's Fear Factor

When top predators disappeared from Mozambique's Gorongosa National Park, other animals fell into unusual patterns. Now scientists are reintroducing wild dogs to restore the park's "landscape of fear" and with it the natural balance of the ecosystem.

  • 2020-10-16T05:00:00-07:00
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  • 2020-10-18T15:00:00-07:00
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  • 2020-10-18T18:00:00-07:00
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Touching The Asteroid

If spacecraft OSIRIS-REx can grab a piece of an asteroid and bring it back to Earth, scientists could gain great insight into our planet's origins, and even how to defend against rogue asteroids. But NASA only gets three shots at collecting a sample.

  • 2020-10-23T05:00:00-07:00
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  • 2020-10-25T15:00:00-07:00
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  • 2020-10-25T18:00:00-07:00
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Can We Cool The Planet?

As global temperatures rise, scientists are exploring geoengineering solutions, from planting trees to sucking carbon out of the air to physically blocking out sunlight. But would it work? And what are the risks of engineering Earth's climate?

  • 2020-10-30T05:00:00-07:00
    KCET-HD