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NOVA

How Atomic Clocks Keep Perfect Time

Modern timekeeping relies on the accuracy of atomic clocks, which revolutionized timekeeping by using the quantum behavior of atoms to measure time. Discover how these incredibly precise clocks work, and how they ensure global synchronization in everything from GPS to scientific research.

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B-29 Frozen in Time
53:54
In Greenland, a deserted B-29 bomber awaits rescue for more than fifty years.
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