So, we are going to Planet MARS !
So, we are going to MARS, before that let us see what we are ? Because before knowing anything, know yourself first. We are Calibrated to Earth's Atmosphere. The existence and function of human beings rely on the specific atmospheric pressure and composition found on Earth: Respiration and Blood Oxygen: The atmospheric pressure at sea level is necessary to create the partial pressure gradient that allows oxygen to diffuse efficiently from the lungs (alveoli) into the blood (capillaries). At very low pressure (e.g., high altitude or on Mars), oxygen saturation (SpO$_{2}$) decreases, leading to hypoxia and altitude sickness. Reference #1 Body Cavity Pressure: The pressure inside the body (in the sinuses, ears, and blood vessels) is regulated to equalize with the outside atmospheric pressure. If the external pressure drops too quickly (as in space or extreme high altitude), internal pressures can cause tissues to expand, leading to nosebleeds, burst eardrums, or even the ...