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Rebuilding 7 World Trade Center

Video
1:48
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The Spacetime Lemonade Stand

Video
2:30
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Reflections on the 9/11 Memorial

Video
2:20
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Heisenberg Humor

Video
1:32
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An Interview With Steve Jobs

Video
50:11
Finding Earth-Like Planets

Finding Earth-Like Planets

Video
4:06
The Mars Rover, "Curiosity"

The Mars Rover, "Curiosity"

Video
4:25
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The Making of "The Fabric of the Cosmos"

Video
5:15
The Higgs Particle Matters

The Higgs Particle Matters

Video
4:46
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Quantum Confidential

Video
2:18
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The Amazing Atomic Clock

Video
3:59
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Light My Fire

Video
1:18
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NOVA

Walls of Glass

One World Trade Center's glass facade may look fragile, but it is extraordinarily tough.