1879-10-21

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: 1879-10-21

(October 21, 1879)
At his Menlo Park, New Jersey laboratory, Thomas Edison produced a usable electric light in 1879.
photo source: wikimedia.org