Category: Afterimages | Date Added: September 22, 2009 | 56 comment(s)
This afterimage is based on one one of the most recent internet trends "rickrolling" in which a link to another web site or video directs instead of Rick Astley's 1987 "Never Gonna Give You Up" music video on Youtube. To see this image stare at the cross in the center for about 30 seconds and then look away at a blank surface - blinking repeatedly can help to make it easier to see.

Image credit: This image is believed to be in the public domain.

Category: 3D Illusions | Date Added: September 20, 2009 | 10 comment(s)
Here's a novel way to promote a product, this carrier bag for something called "Stop 'n Grow" presumably designed to stop compulsive nail-biting has its handles positioned so that it looks as though the hand of the person carrying it is inside the mouth of the woman on the side of the bag. Its an original idea and a nice way to get attention to what you are advertising.

Image credit: Flickr user billypalooza

Category: Double Meanings | Date Added: September 18, 2009 | 37 comment(s)
Special thanks to artist Patrick Trotter for sending in to us this picture he's painted of a black cat. Which way is the cat facing ? It depends on how you look at it, like many other "double meaning" illusions the cat can appear to be facing away from you or towards you. If you have trouble seeing it the other way try gazing at the image for a while - you should see the cat suddenly switch directions, see if you can get the image to switch back and forth.

Image credit: Patrick Trotter

Category: 3D Illusions | Date Added: September 16, 2009 | 8 comment(s)
Introducing the launch of our new Youtube channel this first video shows the Red Cross earthquake billboard illusion we featured recently. We'll be posting up a number of videos covering optical illusions from the site so keep a look out for those and please subscribe to our channel if you haven't done so already.

Image credit: This image is believed to be in the public domain.

Category: 3D Illusions | Date Added: September 14, 2009 | 6 comment(s)
This is another view of the promotional DHL pavement chalk drawing from Julian Beever - this time shown upside-down. The delivery appears to be getting dropped down from the ceiling and looks even more impressive seen this way up.

Image credit: Flickr user Lee Jordan