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: 1846-09-10

(September 10, 1846)
The first US patent (U.S. Patent 4,750) has been given to Elias Howe for a sewing machine with a lockstitch design.
photo source: wikimedia.org

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