What is the Thatcher effect? What does the face below have in common with 'thatcherized' faces at the bottom of the page?
Source (http://www.psychologicalscience.com/cgi-bin/mt/mt.cgi?__mode=view&_type=entry&blog_id=29)
Image source(http://scienceblogs.com/mixingmemory/2006/09/cool_visual_illusions_the_marg.php)
I love this and but it is not that new to me because I looked at this illusion when I did a blog about illusions. I found mine on the PBS website. They had a picture of Abe Lincoln like this! Illusions are a fascinating function or lack thereof of the human brain.