John Tyndall was born on this day in 1820.
A prominent 19th century physicist, he is famous for his studies in diamagnetism, proving why the sky is blue and most importantly for his researches on the action of radiant heat or infrared radiation, which led to him proving the Greenhouse effect.
Tyndall was also a keen mountaineer becoming the first person to climb the Weisshorn in 1861. His interest was so great that he also turned his scientific researches to glaciers and the study of ice.
All of this and he was quite a natty dresser too.