No one knows how many people died during the sinking of the Titanic.
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The time interval from first sighting of the iceberg that sank the Titanic to impact was a little over 30 seconds.
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Clocks made before 1660 had only one hand - an hour hand.
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Leonardo Da Vinci made a robotic lion in 1515 that would walk, sway, open its mouth and move its tail - it even had a compartment that opened to present flowers.
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The first semi-permanent settlements appeared in Florida around 5000 B.C.
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