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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 July 7, 2021

A picture of a loaf of bread.

It was on this date in 1928 that the greatest thing since sliced bread came from a bakery in Chillicothe, Ohio. It was sliced bread. And it was on this date in 1981 that a solar-powered aircraft made a historic flight. The aircraft called Solar Challenger flew across the English channel, flying a total of 163 miles.