Marc Chung sent in 2 pretty kick-ass brain teasers.
Left or Right Brain?
This first one is from The Daily Telegraph that features a female silhouette spinning. Depending on which brain you use predominately, you will see the figure spinning Clockwise or Counter-Clockwise (Anti-clockwise in the article). Click the link to see the animation.
TIP: Left-brain = Logic, Right-brain = Creativity
What do you hear?
The second teaser is an example of the McGurk effect. The McGurk effect is a phenomenon where you can hear different things depending on what you see. In this example, if you watch the movie of the guy speaking you hear the sound “DA DA, DA DA”, but if you listen you clearly hear the sound “BA BA, BA BA”. You can even try looking away mid-movie and what you hear changes.
Update #1: Preston Lee sent in another classic teaser… this one I’ll never get over, but Square A and Square B are the same frigging color:





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