只有20分钟的时长，NASA控制时间的。

宇航员Kate Rubins：She received a Bachelor of Science degree in molecular biology from the University of California, San Diego, and a Ph.D.degree in cancer biology from Stanford University Medical School Biochemistry Department and Microbiology and Immunology Department. She was a member of the Kappa Lambda chapter of the Chi Omega sorority while attending UC San Diego.

https://en.wikipedia.org/wiki/Kathleen_Rubins