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  • concentric-circle-test
    Concentric Circles?
    11 comments »

    True or False: The picture above shows 4 concentric circles.

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  • eye-quiz-lever
    Eye Quiz: Observe the triangle
    4 comments »

    It’s amazing how these diagonal lines can canfound your brain. Is the right side of lever truly lower than the left?

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  • The Spinning Girl
    7 comments »

    Let’s see how flexible your brain is- Can you make the dancer spin both clockwise and counterclockwise?

    [click on picture below to view animation]

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  • Eight is Enough: Cool optical illusion

    Thomas Papathomas just let me know of this new optical illusion he made. Wasn’t initially going to put it up because of its politcal nature, but it’s too neat to pass over:

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  • 3rd Place in the 2008 Best Illusion of the Year Contest

    Professor of Biomedical Engineering at Rutgers University Thomas Papathomas let me know of his really cool mask/face illusion.

    Notice the moving nose ring as well as the rolling eyes. The effect gets even crazier when the mask is turned on its side 1 minute 30 seconds into the video.

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  • yellow blue dot ripple optical illusion
    Ripple Optical Illusion
    3 comments »

    Thanks to krandolph for this cool optical illusion below. If you haven’t played Smartkit’s super high quality jigsaw puzzles yet, go try them now!

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  • table top illusion
    Optical Illusion Tables

    Is the length of the tabletop on the left any different than the width of the tabletop on the right?

    In this optical illusion by Roger Shepard (“Turning the Tables”), the dimensions of the tabletops are amazingly the same!

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  • Cafe Wall Illusion
    1 comment »

    Dr. Richard Gregory first observed this illusion’s effects at a cafe wall in Bristol, where the tiles were arranged in a chessboard-like pattern.

     

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  • best optical illusion involving color difference
    3d color optical illusion by MIT professor
    8 comments »

    Wow, this optical illusion really messes with your brain.

    Hard to believe, but the squares marked A and B are the same shade of gray.

    For an explanation and proof, click

    More »
  • animated pinwheels
    Spinning Pinwheels
    3 comments »

    This neat little optical illusion comes courtesy of www.coolopticalillusions.com.

    Probalby one of the cooler optical illusions I’ve seen in awhile.

    Note that the picture below is not animated!

    More »
  • Crooked square optical illusion
    A crooked square?
    3 comments »

    In this neat optical illusion, is the blue line in the middle a perfect square?

    (Imagine looking at this thing while intoxicated?!?)

    More »

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Recent Comments

  • Migrated: Game: Slip N Slide: Yay! Completed all 50 levels. Just have to go back and get the coins in the ones I...
  • Shawn: To the Moon on a Sheet of Paper: A good point, michaelc. How would the tides be affected by having the earth...
  • Kenny: Sleepy Head: an online cartoon puzzle game: I can’t do it. It’s very difficult. I hope I will know...
  • sandrochess: IQ Test Question Oct 2009: What comes next: a
  • michaelc: To the Moon on a Sheet of Paper: Ha Shawn! That’s funny. Are you trying to destroy the world’s...
  • Tsopi: To the Moon on a Sheet of Paper: no possible…a paper can’t be fold over 8 times whatever the size...
  • rudeboi: 4 Differences: i could sit here all day.
  • joe: To the Moon on a Sheet of Paper: I saw a program here in Europe once that proved you could not fold any size...
  • RK: Word Search: Dog Breeds: Thanks Hex!
  • Hex: Word Search: Dog Breeds: Game Completed! Quite an easy and nice one.
  • mrman: To the Moon on a Sheet of Paper: If folding doubles the total thickness of the stack, then it is 39....
  • james turner: To the Moon on a Sheet of Paper: Let’s define some variables: mm_to_km=0.00001 km/ mm...
  • RK: “Not Even the Queen…” : uh oh! I better get out of here before getting hit with a rotten tomato!
  • Mashplum: To the Moon on a Sheet of Paper: I would have to be an accordion fold, but even then, as the width of each...
  • Mashplum: “Not Even the Queen…” : Thanks, I’m glad you guys liked it. I wrote a bunch of...
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