These two women are working in a chemistry lab.  The one who is looking on seems older, and is probably a pioneer among women in the science field.  She seems to have a lot of experience and now she is teaching her student and advising her.  The student sees her teacher as a mentor, to one day be like her and impact the world like never before with new technology.  Her teacher got the ball rolling, and now it is up to the student to run with it.  The teacher watches very closely, but also proudly of her student, who is primed for fame and success.  One day, the student will take the role of the teacher and become a mentor to someone else in the field.
