What's invisible? More than you think - John Lloyd

source: TED-Ed     2012年9月26日
View full lesson on ed.ted.com http://ed.ted.com/lessons/what-s-invi...
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.