The German Mayflower
On October 6, 1683, the ship Concord landed 13 German families at Philadelphia — the 'German Mayflower' voyage that founded Germantown and opened two centuries of German immigration to America.
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The Stuck Valve That Frightened a Nation
On March 28, 1979, a stuck valve at Three Mile Island triggered America's worst commercial nuclear accident.
Crazy Drake's Gamble: The Well That Started the Oil Age
On August 27, 1859, Edwin Drake's drill struck oil at 69.5 feet near Titusville, Pennsylvania — the first well deliberately drilled for petroleum, and the spark of the modern oil industry.
The Day a Groundhog Became a Weatherman
On February 2, 1887, a group of Pennsylvanians climbed Gobbler's Knob to ask a groundhog about spring — and Groundhog Day was born.