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Watch Cosmos A SpaceTime Odyssey Season 2 Episode 13 online. Maybe available on Youtube, Netflix, PrimeVideo, Hulu, Disney and other legal streaming platforms.

We know less now about the universe than educated Europeans did before the discovery of the Americas. All those billions of galaxies, all those stars, planets and moons--they amount to a meager 4 per cent of what really awaits out there. This awareness is the humility that distinguishes science from other human activities. It savors the fact that even bigger mysteries, mysteries like dark energy, await us.