The crew of the ISS just took the first step towards making the orbital laboratory a little safer for its inhabitants. For the first time ever, NASA astronauts have sequenced DNA in microgravity. The experiment was actually a test to see if a MiniION portable DNA sequencer would work in orbit -- so far it does. The samples tested on the ISS produced the same results as a control group back on earth. If further tests pan out, astronauts will be able to use the sequencer to test microbes found on ISS surfaces.