It's the birthday of John Tyndall, who was born in 1820 in Leighlinbridge, Irela...

It's the birthday of John Tyndall, who was born in 1820 in Leighlinbridge, Ireland. Tyndall was among the first physicists to treat Earth's atmosphere as a thermodynamic system. To carry out his studies, he built instruments to measure how the atmosphere's molecular constituents absorb radiation. He also invented a respirator for firefighters and a more effective foghorn for ships