Head designer Matias Corea hosted a little Helvetica 101 session with the Behance team last week. For those who haven't seen the documentary about the classic typeface - which, by the way, is required viewing for new hires at Behance - it is ubiquitous on the web and in design circles. Here he is illuminating the differences between Arial and Helvetica, after which he gave us a quiz. We all passed! Check out this chart to spot the difference yourself, and then take a quiz if you're feeling inspired.