In Georgia, there is an airtight room called the Crypt of Civilization that was sealed in 1940. It contains numerous artefacts documenting what life was like at the time of sealing, and is scheduled to be opened in the year 8113 to show people of the future exactly what life was like.
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The strangers in your dreams are actually people that you've seen in real life.
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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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