http://arstechnica.com/science/news/2010/11/arstv-launch-and-our-diy-science-contest.ars
"Your mission (should you choose to accept it) is to use video to explain a scientific concept in terms that a high school science class would not only understand, but actually be interested in watching. The videos must be short (less than three minutes long) and should take advantage of the medium. No narrated PowerPoint presentations—we want your images to move!"
