21h 1min, jan 1, 1774 y - Joseph Priestly- 1774 isolated and discovered “Oxygen” but called it dephlogisticated air. Due to an illness, he developed in his younger years he was left with a stutter for the rest of his life.
Added to timeline:
Date:
21h 1min, jan 1, 1774 y
Now
~ 250 years ago
