We live at the bottom of an invisible ocean of gas.As Professor Brian Cox explains, the Earth is surrounded by roughly 5 million billion tonnes of air. This creates a staggering pressure equivalent to 10 tonnes pressing against every square meter of our bodies.We don't collapse under this immense weight because air pressure doesn't just push down. It pushes equally in every possible direction.As demonstrated by a simple glass of water, this invisible upward force is strong enough to effortlessly