3 facts
five people were sent in for 1 year.
they are located in a dome on the side of a Hawaiian volcano.
the trip to Mars could take 1-3 Years! 

2 questions
I wonder how the test went & what they got out of it?
It said: ‘We have the technology but there are still heaps of challenges to overcome.’- (this was in 2015) have we made any progress with these problems?

1 understanding
I now understand the problems that we might face if we went to mars

link to the video:
link