The strangers in your dreams are actually people that you've seen in real life.
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In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
4
Mars had an oxygen-rich atmosphere around 4 billion years ago
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
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The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
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