15. Calculus
Reviewing for that math exam online could prove problematic if you aren’t careful about what you’re searching for on Google. Calculus Bridge, for example, sounds like something your professor would be discussing in a lecture but really is something very, very different altogether. The term refers to the hardened plaque that “bridges” across the teeth, caused entirely by poor oral hygiene. Believe us, reading our description of it here is way better that seeing pictures of it, so we’d think twice about looking for them if we were you.
