Congress created the Oregon Territory, which included Oregon, Washington, Idaho, and Western Montana.
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Pakistan gained independence from the British Empire – a day before India's independence.
A rainfall survey named 'It is raining plastic' announced that tiny plastic particles were found in 90% of rain samples in Colorado, US.
The New York Eye Infirmary opened, and it was the first specialty hospital of its kind in the western hemisphere.
After being in construction for 632 years, the Cologne Cathedral was completed.
Singapore opened the world's first Summer Youth Olympics Games.
