View full lesson on ed.ted.com http://ed.ted.com/lessons/what-s-invisible-more-than-you-think-john-lloyd Gravity. The stars in day. Thoughts. The human genome. Time. Atoms. So much of what really matters in the world is impossible to see. A stunning animation of John Lloyd\'s classic TEDTalk from 2009, which will make you question what you actually know. Lesson by John Lloyd, animation by Cognitive Media. Show Less >>