ISS Celebrates 25 Years of Unbroken Human Presence in Space

The International Space Station marked a major milestone in 2025 by completing 25 years of continuous human presence. Astronauts from different nations carried out vital research throughout the year, advancing science for life on Earth and future space missions. Their work included over 750 investigations, from medical breakthroughs to cutting-edge technology tests.

On November 2, 2025, NASA and its global partners celebrated a quarter-century of uninterrupted human activity aboard the ISS. Crews from multiple countries contributed to experiments that spanned medicine, biology, and engineering. One key focus was developing next-generation medications, with studies aimed at improving treatments for diseases on Earth.

The station also tested innovative solutions for space challenges. Researchers explored ways to store data in DNA and produce nutrients on demand for long missions. Another highlight was the demonstration of technologies to remove space debris and service satellites, addressing growing concerns about orbital safety. Throughout the year, astronauts captured over one million images. These documented experiments, observed Earth's changing landscapes, and recorded celestial events. Scientists on the ground relied on these visuals to analyse results and refine future research. The ISS also played a role in NASA's Artemis program, which aims to return humans to the Moon. Data and techniques developed on the station supported preparations for lunar missions, ensuring safer and more efficient exploration.

The 25th anniversary of continuous human presence on the ISS underscored its importance as a hub for global cooperation. Research conducted in 2025 delivered tangible progress in medicine, technology, and space exploration. The station's work continues to benefit life on Earth while paving the way for humanity's return to the Moon and beyond.