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NOVA
What Are UFOs?
Season 52
Episode 1
After decades in the shadows, UFOs are being studied seriously. Are they weather balloons, optical illusions, secret military technology? Or something else? Follow scientists as they try to unravel the mystery of the strangest objects in our skies.
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See how Earth transformed from a barren hellscape to a planet capable of sustaining life.
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Dive into the subconscious to see what’s really driving the decisions you make.
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Neuroscientists discover the tricks and shortcuts the brain takes to help us survive.