This is Astronaut Jessica Meir. She is also a professor of anesthesia at Harvard Medical School. She has a Ph.D in marine biology from Scripps. She spent time diving in Antarctica studying penguins, and is currently studying how geese can fly over Mount Everest. She lived underwater for 5 days to study long-term effects of mixed-gas atmospheres. And she's pretty cute, too. She's either one of those damn overachievers, or she can't hold a steady job.