TED-Ed
Jon Bergmann: Just how small is an atom?
Just how small are atoms? Really, really, really small. This fast-paced animation from <a href="http://ed.ted.com">TED-Ed</a> uses metaphors (imagine a blueberry the size of a football stadium!) to give a visceral sense of just how small atoms are. <i>Lesson by Jon Bergmann, animation by Cognitive Media.</i>