Jessica Ulrika Meir is a NASA astronaut, marine biologist, and physiologist. She was previously Assistant Professor of Anesthesia at Harvard Medical School, Massachusetts General Hospital, Boston, following postdoctoral research in comparative physiology at the University of British Columbia. She has studied the diving physiology and behavior of emperor penguins in Antarctica, and the physiology of bar-headed geese, which are able to migrate over the Himalayas. In September 2002, Meir served as an aquanaut on the NASA Extreme Environment Mission Operations 4 crew. In 2013 she was selected by NASA to Astronaut Group 21. Meir launched on September 25, 2019 to the ISS onboard Soyuz MS-15, where she will serve as a flight Engineer during Expedition 61 and 62. On October 18, 2019, Meir and Christina Koch were the first women to participate in an all-female spacewalk.