The International Space Station is an orbiting laboratory that has hosted astronaut-scientists for 20 years
To date, researchers from around the world have conducted some 3,000 experiments aboard the station
Image: NASA
Here are four more of the most impressive bits of ISS research
Image: NASA
An artificial retina, made from a light-sensitive protein, is being developed for retinal degeneration. Space manufacturing is improving production, with potential for clinical use
Image: NASA
Invisible Flames: Flames behave differently in microgravity. They burn cooler, slower, and without a visible flame. Researchers are studying these "invisible flames" to potentially improve combustion efficiency and reduce pollution on Earth
Image: NASA
Ageing in Space: Astronauts experience accelerated ageing in microgravity. ISS research on rodents is studying this to understand human ageing. The goal is to develop treatments for age-related diseases like osteoporosis and cancer
Image: NASA
Biomining in Space: Microbes can extract rare earth metals from rocks, a process called biomining. Surprisingly, this process works in microgravity. Researchers believe this could be used to extract resources for future lunar or Martian settlements