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Sometimes you can forget that there is air around you, but air is important to us in many ways. Because of the air, there is a constant pressure around us. When you climb high mountains, your ears can get blocked because the pressure drops so much. Or you can dive deep and feel a sharp increase in pressure. But what is pressure really? In both air and water, pressure is the reason for buoyancy. See more about buoyancy here: • Buoyancy