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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 October 27, 2021

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SIMON
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PIXABAY

It was on this date in 312 that Constantine had a vision of a cross from heaven. He became the first Roman emperor to adhere to Christianity. And it was on this date in 1925 that Fred Waller patented water skis.