If you're interested in this there have been several submissions of pretty much exactly the same thing:<p><a href="http://searchyc.com/change+blindness" rel="nofollow">http://searchyc.com/change+blindness</a><p><a href="http://news.ycombinator.com/item?id=1020494" rel="nofollow">http://news.ycombinator.com/item?id=1020494</a><p><a href="http://news.ycombinator.com/item?id=1020405" rel="nofollow">http://news.ycombinator.com/item?id=1020405</a><p><a href="http://news.ycombinator.com/item?id=995513" rel="nofollow">http://news.ycombinator.com/item?id=995513</a><p><a href="http://news.ycombinator.com/item?id=152842" rel="nofollow">http://news.ycombinator.com/item?id=152842</a>