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For over 25 years, the Twin Towers defined the New York skyline and epitomized everything the United States stood for. And then in just a couple of hours, they were gone. 9/11 remains the deadliest act of terrorism on American soil, but how did an attack of this scale happen and why were we so unprepared for it? Through investigative reports, declassified documents, and interviews with first responders and those who were involved at the highest level, we reveal ten fatal mistakes that together led to that horrific, tragic day.
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“I would rather have questions that can't be answered than answers that can't be questioned.”
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Brings viewers all the amazing news-breaking advances in science in technology from 2021. Startling discoveries from around the globe, from a prehistoric nursery to a covid treatment breakthrough. Join us for an exclusive hyper-tour from earth to space.
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Just 92 elements made up the world, but the belief that were only four - earth, fire, air and water - persisted until the 19th Century. Professor Al-Khalili retraces the footsteps of the alchemists who first began to question the notion of the elements in their search for the secret of everlasting life. He reveals the red herrings and rivalries which dogged scientific progress, and explores how new approaches to splitting matter brought us both remarkable elements and the new science of chemistry.
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In the first of 3 episodes we take a look at how the telescope was invented, from Galileo to Edwin Hubble, and how the invention reaches the universe 13 billion light-years out. Narrated by Patrick Stewart.
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The promise of time travel has long been one of the world's favorite scientific "what-ifs?" Hawking explores all the possibilities, warping the very fabric of time and space as he goes.
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