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04:26 And this innovation, it's not just a model for chemical and coal-power-free purification. Since Calcutta's core has no formal treatment, it's the city's only way of cleaning the water downstream before it enters the Bay of Bengal. What I find so unbelievable about this infrastructure is that as cities across the world in Asia and in Europe begin to replicate this exact system, Calcutta is ..

08:53 And then there's social media. I can imagine some pretty frickin' dystopian scenarios where things like internet quizzes, dating apps, horoscopes, bots, all combine to drag you down deeper and deeper rabbit holes into bad relationships and worse politics. But then I think about the conversations that I've had with people who work on AI, and what I always hear from them is that the smarter ..