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These Ancient Stones Helped Track the Seasons

These Ancient Stones Helped Track the Seasons

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2:57
How to Calculate Time With an Islamic Astrolabe

How to Calculate Time With an Islamic Astrolabe

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2:38
The Mystery and Physics of the Spiral Football Pass

The Mystery and Physics of the Spiral Football Pass

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3:43
Ancient Cliff Paintings in the Amazon

Ancient Cliff Paintings in the Amazon

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3:20
Ancient Pyramids Uncovered in the Amazon

Ancient Pyramids Uncovered in the Amazon

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3:56
JWST Searches for Life in Our Solar System

JWST Searches for Life in Our Solar System

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6:22
How NASA Colors Images of the Universe

How NASA Colors Images of the Universe

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3:08
Soothing Science: The Light You See at Sunset

Soothing Science: The Light You See at Sunset

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8:01
How the West Is Making It Rain, With Science

How the West Is Making It Rain, With Science

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6:22
There’s Something Living in Wildfire Smoke

There’s Something Living in Wildfire Smoke

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1:59
How Extreme Heat Overwhelms the Human Body

How Extreme Heat Overwhelms the Human Body

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1:26
How Sewage Becomes Drinking Water

How Sewage Becomes Drinking Water

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2:51
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NOVA

These Trains Take Over for Their Drivers to Cut Travel Time

To keep trains running on schedule, a new feature allows them to reverse direction and change tracks while the driver walks to the other end.
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Beyond the Elements: Reactions
53:31
Season 47 Episode 17
Beyond the Elements: Reactions
Discover the fascinating chemistry that makes our world and everything in it—including us.
Can We Cool the Planet?
53:31
Season 47 Episode 16
Can We Cool the Planet?
Scientists look to geoengineering and other methods to cool the planet.
Nature's Fear Factor
53:21
Season 47 Episode 9
Nature's Fear Factor
Can bringing predators—and fear—back into an ecosystem help restore its natural balance?
Cat Tales
53:21
Season 47 Episode 3
Cat Tales
Goddess, demon, house pet? What does science say about the human relationship with cats?
Polar Extremes
1:52:46
Season 47 Episode 1
Polar Extremes
Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
Decoding da Vinci
53:30
Season 46 Episode 21
Decoding da Vinci
Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
Why Bridges Collapse
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53:25
Season 46 Episode 18
Why Bridges Collapse
Can new engineering techniques help prevent deadly bridge collapses?
Rise of the Mammals
53:15
Season 46 Episode 17
Rise of the Mammals
Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
Back to the Moon
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53:32
Season 46 Episode 11
Back to the Moon
Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
The Next Pompeii
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53:22
Season 46 Episode 6
The Next Pompeii
In the shadow of Vesuvius and Pompeii, a lesser-known volcano puts Naples at risk.
Rise of the Rockets
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53:34
Season 46 Episode 5
Rise of the Rockets
New technologies are promising a new renaissance in space travel.
Decoding the Great Pyramid
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53:23
Season 46 Episode 4
Decoding the Great Pyramid
New archeological evidence shows the stunning engineering of the Great Pyramid of Giza.
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