The top 5 most-watched science videos on YouTube in 2011

http://m.theatlantic.com/technology/archive/2011/12/the-top-5-most-watched-science-videos-on-youtube-in-2011/250302/#slide1

The top 5 most-watched science videos on YouTube in 2011

Make sure you see the "Incredible Shade Illusion!" (number 2 with 5.9 million views).

http://www.theatlantic.com/technology/archive/2011/12/the-top-5-most-watched-science-videos-on-youtube-in-2011/250302/#slide1

Stunning optical illusion

http://www.gizmodo.com.au/2011/07/how-a-parisian-artist-created-this-stunning-optical-illusion/

Ball in the glass illusion

http://www.newscientist.com/blogs/nstv/2011/04/friday-illusion-ball-in-glass-mystery.html#more