A written year
1750 — already written.
That year was
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Days ago (about)
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Years ago
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Generations back
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Lifetimes back
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Full moons since (about)
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Zodiac cycles since
The world then
The steam engine is still just a mine pump — Watt's great improvement is about two decades away. No trains, no photographs, no electric light. The whole world holds roughly 800 million people.