Switch to the dark mode that's kinder on your eyes at night time.

Switch to the light mode that's kinder on your eyes at day time.

Switch to the dark mode that's kinder on your eyes at night time.

Switch to the light mode that's kinder on your eyes at day time.

This Day in History: 1945-01-25

(January 25, 1945)
Grand Rapids, Michigan, became the first city in the United States to add fluoride to its water supply in order to prevent tooth decay.

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