Jessica Ulrika Meir is an esteemed American marine biologist and NASA astronaut known for her significant contributions to space exploration and scientific research. Meir earned her Ph.D. in marine biology from Scripps Institution of Oceanography, where she studied the physiology of animals in extreme environments. Selected by NASA in 2013, she made history as part of the first all-female spacewalk in 2019, alongside fellow astronaut Christina Koch. Meir's work on the International Space Station (ISS) has focused on physiological and biological experiments in microgravity. Her achievements have been recognized with numerous awards, highlighting her dedication to advancing our understanding of life sciences and space exploration.