How do we keep humans alive in the vacuum of space?

Spaceflight technology has focused on sustaining human life since before our first missions. This video explores the evolution of life support systems, moving from basic filters to the advanced recycling equipment currently keeping astronauts alive on the International Space Station.

Sustaining life in space requires systems that manage biological needs while simultaneously removing waste byproducts. Early spaceflight relied on simple scrubbers and solid fuel oxygen generators to maintain a habitable environment.

Modern long-duration missions, such as those on the International Space Station, have transitioned to sophisticated rack-based hardware. These systems prioritize recycling to reduce the total volume of consumables needed, ensuring the air remains fresh and breathable for the crew.

Source: Keeping Astronauts Alive - Everything You Need To Know About Life Support In Space