NASA astronaut Kate Rubins speaks to students at the Bloomberg Center for Physics and Astronomy on the campus of Johns Hopkins University, Monday, April 24, 2017 in Baltimore, Md. Rubins conducted two spacewalks and became the first person to sequence DNA in space during her 115 day mission as part of Expedition 48 and 49.

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Keywords: baltimore, hopkins, joel, johns, kate, kowsky, maryland, md, nasa, rubins, university