ISS Legacy and the Commercial Space Race: Why 2020s Are Launching Humanity Into Deep Space
When the International Space Station was first assembled in 1998, NASA envisioned it as more than a laboratory. It would be a bridge into the solar system—a place to master living and working in space, develop life‑support systems and test technologies before committing astronauts to long voyages. In 2025, with the ISS still orbiting 400 kilometres above Earth, that vision is clearer than ever. Micro‑gravity is a harsh teacher. On the ISS, astronauts must adapt to drinking in weightlessness, sleeping in vertical sleeping bags and maintaining fitness when bones and muscles quickly weaken. Research has explored how spaceflight affects eyes, brain, bones, muscles and the cardiovascular system, yielding countermeasures like exercise regimens and new medical protocols nasa.gov. Experiments have advanced fluid dynamics, combustion and materials science; lessons learned have improved consumer products on Earth and refined life‑support hardware.
