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Mark Pennell sits at the helm of his time machine.Mark's Almanac is a 90-second time travel that highlights the world's history from the very serious to the sometimes sublime.

Mark's Almanac for August 30, 2021

A photo of the Eiffel Tower in Paris.

It was on this date in 1901 that Hubert Cecil Booth patented a motorized vacuum cleaner, the first of its kind. And it was on this date in 1993 that the 150 millionth visitor visited the Eiffel tower. It was a feat that almost didn't happen as the tower was slated to be destroyed upon the conclusion of Paris' world's fair.