secondsly, when you see an example of someone like petra, what stands out to you?uck me is not only that she was a bright individual, but the importance of mentorship and role models. her father took her to science lectures when she was young, she had great female roll models, and role models and mentorship are important to keeping women in stem field. we have a disparity between men and women with degrees in stem fields. you see drop-offs of women that are able to ascent to a c.e.o. of a tech company or getting a teenure professorship. role models is a factor to retaining women. >> did you have a role model for your ph.d. ? >> my role model was my dad, which is what i related to when it came to petra. what instruct me about her was her passion for her subject and her enthusiasm. i don't remember at the aim of 18 being that -- aim of 18 being that clear about what i wanted to do this science. it was inspiring. >> what i can relate to is not just the passion about the science, but the aryanism, she -- organism, she seemed to love the birds. that was me at that age.