British researchers have launched a groundbreaking biological experiment to the International Space Station (ISS), using microscopic worms to study how living organisms respond to the harsh conditions of space.
The project, led by the University of Exeter, engineered by the University of Leicester, and funded by the UK Space Agency, aims to generate insights that could support future human missions to the Moon and beyond.
Supporting the next era of lunar exploration
The experiment comes as NASA advances its Artemis programme, including the upcoming Artemis II mission, which will send astronauts on a 10-day journey around the Moon. The broader goal is to establish a sustained human presence on the lunar surface for the first time since 1972.
Scientists say understanding how biological systems adapt to space will be critical to keeping astronauts healthy during these longer missions.
Worms in space
At the heart of the experiment are Caenorhabditis elegans, microscopic nematode worms around 1mm in length, widely used in scientific research due to their biological similarities to humans at a cellular level.
The payload launched aboard the Northrop Grumman CRS-24 Mission from the Kennedy Space Center and will be installed on the exterior of the ISS using a robotic arm.
Once deployed, the experiment will expose the worms to microgravity, radiation and the vacuum of space for up to 15 weeks, with researchers on Earth monitoring their condition remotely.
Tackling the health risks of deep space
Extended space travel poses serious risks to human health, including bone and muscle loss, fluid shifts that can impair vision, and increased exposure to radiation that may damage DNA and raise cancer risk.
By observing how the worms survive and adapt under these conditions, scientists hope to identify biological mechanisms that could help mitigate these effects in humans.
Dr Tim Etheridge of the University of Exeter said the research marks an important step towards enabling safe, long-duration missions.
“By studying how these worms survive and adapt in space, we can begin to identify the biological mechanisms that will ultimately help protect astronauts,” he said.
Miniature lab with big ambitions
The experiment is housed in a compact “Petri Pod”—a self-contained unit roughly 10x10x30cm in size and weighing around 3kg. It contains 12 chambers designed to sustain life in space, maintaining temperature, pressure and breathable air, while supplying nutrients via an agar-based system.
Advanced imaging technology, including fluorescent and white light optics, will allow researchers to track changes in the worms over time through still images and time-lapse video.
The project also demonstrates how complex biological experiments can be conducted in space at smaller scale and lower cost—an important step in expanding access to orbital research.
Backing UK space innovation
UK Space Minister Liz Lloyd said the mission highlights the country’s growing capabilities in space science and innovation.
“It might sound surprising, but these tiny worms could play a big role in the future of human spaceflight,” she said, adding that the research could help astronauts “stay healthy and return home safely” as space exploration enters a new era.
The mission is being managed in partnership with Voyager Space Technologies and builds on earlier UK-funded research into miniaturised space experiments.
As global efforts to return humans to the Moon gather pace, scientists believe even the smallest organisms could hold the key to overcoming some of space travel’s biggest challenges.
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