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Petra: Lost City of Stone Preview
How did early engineers carve tombs into rock cliffs and funnel water to this desert city? Airing February 18, 2015 at 9 pm on PBS
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53:20
A visionary scientist investigates the deep history of astronomy in West Africa.
53:20
Thousands race to build Europe's biggest construction project–London's new railroad.
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53:32
Discover how the concepts of zero and infinity revolutionized mathematics.
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53:22
What exactly is crypto, and how does it work? This technology is more than just money.
53:31
Who created the Nazca lines and why? New clues to one of the greatest ancient enigmas.
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53:32
Meet one of the ocean’s most beautiful and destructive species: Lionfish.
53:47
Psychedelics are unlocking new ways to treat conditions like addiction and depression.
53:30
Is artificial intelligence making policing and courts fairer, or is it increasing bias?
53:30
A team tackles the restoration of iconic Notre Dame Cathedral.
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53:31
Can innovative engineering projects save Venice?
53:33
Can innovative drugs and therapies finally end HIV?
53:33
Discover how NASA engineers built and launched the most ambitious telescope of all time.