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It is known that spaceflight reduces the crew’s immune systems, their ability to fight off infections, and once safety experts had confirmed that a fungus was growing in the greenhouse, the unavoidable decision was made to carefully remove the greenhouse from the ISS, thus avoiding any probability of causing any harm to the astronauts.  
 

	Paolo with greenhouse at the Space Station

The Arabidopsis plants, already having proved themselves as a hardy growers in space, seemed to grow very well despite the uninvited hitch-hiker on board.

Paolo was the first one to remark that simple procedures on Earth are extremely complex and possibly dangerous in weightlessness. "Part of the experiment was indeed a success: we were able to grow the plants and observe them."

Watch here how Paolo disposed his greenhouse.

Even though some experiments can go wrong, Paolo said, "This is a lesson to be learned that we can leave to the future astronauts. I’m sure they will get even better at it."
 
 
From real Space Station to virtual Mars spacecraft
 
The Greenhouse in Space education project moves on and encourages participating students throughout Europe to continue their experiments and monitor their plants even more closely. Now it is time to compare their greenhouses with the martian ones, as the crew of Mars500 found four of these little greenhouses packed in their lander module with all other cargo.

Now they are carefully growing the same plants in their spacecraft-like modules and the results are coming in – have a look at the video below.

	After three weeks

The Project's group on Facebook has discussions and photos. Teachers can follow the lesson online and should send their class results to the HSF education team at the end of the project.