Fresh from the ISS: how a group of high school students is leading an experiment on space-made yoghurt

21.08.2023 - 11:40 / theunconventionalgardener.com / guest

By Sara Webb, Swinburne University of Technology and Rebecca Allen, Swinburne University of Technology

It’s probably no surprise that keeping healthy in space is incredibly important. And without the typical resources found on Earth, creative solutions have to be explored.

Right now, some excited Year 10 and 11 students from around Victoria are waiting with anticipation as their space-made yoghurt – fresh off the International Space Station (ISS) – heads back to Australia from NASA facilities in the United States.

The students worked with researchers at the Swinburne University of Technology to design an experiment investigating the nutritional values of space-made yoghurt. The results could provide insight into how to best help astronauts with vital nutrition during long-haul spaceflight.

A critical factor in human health is the overall health of our gut microbiome, which is estimated to host more than 100 trillion bacteria.

Maintaining the health and diversity of these bacteria might be even more important in space than on Earth. In 2019, NASA released groundbreaking results from a year-long study on astronaut twins Mark and Scott Kelly.

In 2016, Scott spent 365 days on the ISS, experiencing reduced gravity, while Mark remained on Earth. A fascinating result from the study was that Scott experienced significant changes to his gastrointestinal microbiome when in space – and which didn’t persist after he returned to Earth.

It’s theorised the changes in microbiome experienced by astronauts are due to the lack of exposure to the “everyday” microbes encountered on Earth. Additionally, astronauts in space are exposed to less gravity, and high levels of radiation, which increase as they travel further away.

Understanding how to