Just how small are atoms? Really, really, really small. This fast-paced animation from TED-Ed uses metaphors (imagine a blueberry the size of a football stadium!) to give a visceral sense of just how small atoms are. Lesson by Jon Bergmann, animation by Cognitive Media.
At TEDYouth 2011, performance artist Carvens Lissaint shows how to use language, metaphor and imagery to express a powerful idea -- as in this spoken-word performance, a stirring plea to make college education more accessible.