It's time for our Q&A, this time from Edinburgh! This week, what happens if you get pregant in space? How do chemists make new molecules? And how do antidepressants work? Chris Smith is joined by our panel of experts to answer your questions: Space doctor Christina Mackaill, geologist John Underhill, chemist Lee Cronin and psychiatrist Stephen Lawrie. Like this podcast? Please help us by supporting the Naked Scientists