dr. rita el-khouri is one of some 3,000 female scientists working for l'or?al, the sponsor of the website. so, why don't more girls go into s.t.e.m. careers like science and math? >> i think part of the reason why a lot of girls aren't going into those fields today is because we don't have enough role models and resources that are encouraging and inspiring the youth to be interested in s.t.e.m. fields. that's why, actually, l'or?al usa has created a explore, discover, and achieve in the great world of science, technology, engineering, and mathematics, or the acronym s.t.e.m. [ majestic music plays ] >> we'll talk more about the site in a few minutes, but first let me tell you about my visit to the new york hall of science. there i met saijah, a high-school senior. she volunteers at the hall as an "explainer." we need to get you a smock just for safety. >> perfect. matches my shirt. >> it does. [ rock music plays ] so, here's where we're working? >> so, yeah, this is our lab table right here. so, before we begin our really cool experiment, let's put on our glo