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Birds in flight
Category: Moving Images | Added: January 18, 2013 | 2 comments
On first glance you might be forgiven for thinking this illusion does not appear to be doing very much, but if you stare at the image long enough the birds will start to move. Can you tell which birds are moving and in what direction they are flying ?

Birds in flight
Image Credit: This image is believed to be in the public domain.

Mona Lisa afterimage
Category: Afterimages | Added: January 17, 2013 | 11 comments
This is an afterimage painting by artist Dimitri Parant. If you concentrate 30 seconds on the white dot and then close your eyes for 10 seconds you'll see the face of the Mona Lisa.

Mona Lisa afterimage
Image Credit: CC 2.0 Dimitri Parant

Slanted house illusion
Category: Size and Distance | Added: January 16, 2013 | 3 comments
Tobias Thierer took this photograph of a house on Baldwin Street in Dunedin, New Zealand. You might be forgiven for thinking that the people who live there would have difficulties getting in and out of their front door without falling over, but is it the house that's slanted, the hill it rests on or the cameraman ?

Slanted house illusion
Image Credit: (PD) Tobias Thierer

Shake your head illusion
Category: Shape and Color | Added: January 31, 2012 | 48 comments
Here's an illusion that's sure to give you a headache. Try staring at the vertical lines while shaking your head from side to side - you should see something interesting.

Shake your head illusion
Image Credit: This image is believed to be in the public domain.

Temple of many columns
Category: Impossible Objects | Added: May 28, 2011 | 79 comments
Naile sent us this drawing of a rather unusual temple, while at a glance it may seem that there\'s nothing particularly unusual about it if you look closer you will find that the number of columns are somewhat confusing to determine. How many can you count in the picture ?

Temple of many columns
Image Credit: This image is believed to be in the public domain.

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