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Watch Nova Season 51 Episode 15 online. Maybe available on Youtube, Netflix, PrimeVideo, Hulu, Disney and other legal streaming platforms.

 Whether on social media or surfing the web, you probably share more personal data than you realize. That can pose a risk to your privacy – even your safety. But at the same time, big datasets could lead to huge advances in fields like medicine. Host Alok Patel leads a quest to understand what happens to all the data we're shedding and explores the latest efforts to maximize benefits – without compromising personal privacy.