This was a groundbreaking discovery because it:
* Proved that air has weight. Before this, it was thought that air was weightless.
* Demonstrated that air pressure exists and varies. This led to the development of weather forecasting and other applications.
* Challenged the prevailing theory of the vacuum. Prior to Torricelli, many believed that a vacuum could not exist. His invention helped to establish the existence of a vacuum.
This discovery revolutionized our understanding of the atmosphere and paved the way for many advancements in science and technology.
