Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling ...

In addition to millibars, pressure is sometimes measured using a unit called atmosphere (atm). One atmosphere equals 29.9213 inches (1,013 millibars) of mercury (in. Hg), the science blog says.

Air molecules colliding with a surface cause atmospheric pressure. Atmospheric pressure at sea level is about 101,000 Pa (101 kPa) but just 27,000 Pa (27 kPa) at the cruising altitude of a ...

Every year, from December to April, the Harmattan sweeps across Africa. This cool, dry and dust-laden wind gets its name from haramata, a word in the Ghanaian language Fanti. More than 100 million ...