“Density is a location of pressure capable of releasing unqualified qualities.”

We’re under 14.7 pounds per square inch of barometric pressure at sea level, while the inside of the body must maintain 14.6 pounds per square inch to maintain respiratory equilibrium.

“Take away gravity and the human machine hardly knows how to behave. The gut rebels, sending food back up the esophagus; blood and other fluids shift upward too, giving astronauts puffy faces; and the volume of blood swells in the eyes’ tiny vessels, shortening focal length and decreasing near vision acuity.”

“At sea level, the air pressure is about 15 pounds per square inch. So, on our heads and shoulders, there is a total pressure of about one ton! Fortunately, the pressure inside our bodies is the same as the pressure outside. This balance of pressure ensures that we are not crushed by the atmosphere.”