YouTube's women of STEM make learning about science fun

This post is part of Mashable's ongoing series The Women Fixing STEM, which highlights trailblazing women in science, tech, engineering, and math, as well as initiatives and organizations working to close the industries' gender gaps
Learning shouldn't stop after school ends, and the women of YouTube's STEM channels prove that.
These aren't the boring science lessons that you had to sit through in stuffy high school classrooms or massive college lecture halls. There are no tests, no grades, and n