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: 1963-07-19

(July 19, 1963)
During X-15 Flight 90, Joe Walker flies a North American X-15 to a record altitude of 106,010 metres (347,800 feet). By exceeding 100 kilometres in altitude, this aircraft qualifies as a human space flight according to international convention.

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