If you're interested in this there have been several submissions of pretty much exactly the same thing: http://searchyc.com/change+blindness http://searchyc.co

If you're interested in this there have been several submissions of pretty much exactly the same thing: http://searchyc.com/change+blindness http://searchyc.com/change+blindness http://news.ycombinator.com/item?id=1060762 http://news.ycombinator.com/item?id=1060762 http://news.ycombinator.com/item?id=1020494 http://news.ycombinator.com/item?id=1020494 http://news.ycombinator.com/item?id=1020405 http://news.ycombinator.com/item?id=1020405 http://news.ycombinator.com/item?id=995513 http://news.ycombinator.com/item?id=995513 http://news.ycombinator.com/item?id=152842 http://news.ycombinator.com/item?id=152842 I'm pretty sure I also first saw this gorilla follow-up here on HN, but I don't have time to track it down.