Space stinks!
Anyway at one point she mentions that after docking with the ISS they open the hatch and the cosmonaut's tell her to get ready to take a big whiff as this is the only time she will be able to smell 'space' which she then describes as smelling like a burnt cookie.
I was a bit perplexed by this as I asked myslef "how can a total vacuum have a scent'. So I had a bit of hunt around and found many an article about space having a smell but little explaining the phenomena. The only thing my limited brain cells could conclude was that either something is reacting to the cosmonaut kit or there are post big bang particles floating around that have scent. Either that or the entire universe is a giant intergallatic cookie recipe that went pear shaped,