In 1643, Torricelli used mercury to measure the hidden pressure of Earth’s air

In the 17th century, Evangelista Torricelli revolutionized meteorology by inventing the mercury barometer, fundamentally altering our comprehension of atmospheric pressure. His groundbreaking device unleashed a cascade of experiments correlating pressure changes with variations in altitude. Additionally, through the use of vacuum pumps, he painstakingly delved deeper into the nuances of atmospheric forces. Torricelli’s pioneering efforts serve as the bedrock of contemporary atmospheric science.