Surviving in Space: The Limits of Human Endurance Without a Spacesuit

Without a spacesuit, a person would not survive for long in the harsh vacuum of outer space. Within 10 to 15 seconds, they would become unconscious due to a lack of oxygen. Holding your breath would be dangerous as the oxygen in your body would expand and rupture your lungs, causing fatal embolism. Bodily fluids would boil, and the lack of pressure would lead to deadly issues. Brain death would follow within minutes unless the person is rescued and brought back to a pressurized, oxygen-rich environment. Spacesuits not only provide oxygen and pressurization but also protect astronauts from extreme temperatures, radiation, and micrometeoroids.