2. The balls in this image are all the same colour. And that colour is... brown (!) https://www.reddit.com/r/woahdude/comments/c0p6vp/all_of_these_balls_are_actually_the_same_color/ …pic.twitter.com/VnuRlUTJ5K
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2. The balls in this image are all the same colour. And that colour is... brown (!) https://www.reddit.com/r/woahdude/comments/c0p6vp/all_of_these_balls_are_actually_the_same_color/ …pic.twitter.com/VnuRlUTJ5K
3. This one will mess with your head. How many black dots are there? The answer is 12, but your visual system won't let you see all of them at once. Explanation here: https://www.theverge.com/2016/9/12/12885574/optical-illusion-12-black-dots …pic.twitter.com/M2vDrNpTXH
4. One of the best illusions I've seen. The blue and red lines are all the same length; none is moving or changing size, and they're all at the same level. Only the arrowheads are moving. https://www.giannisarcone.com/Muller_lyer_illusion.html …pic.twitter.com/GrbGXEDAXP
5. None of these cogs is actually turning or moving at all. W. T. F.
HT @jagarikinpic.twitter.com/gVPbFgpujS
6. Rotating Rings: Every time you switch from looking at one wheel to looking at the other, they both change direction. https://buzzfeed.com/kellyoakes/captivating-optical-illusion-gifs-that-will-make-your-brain …pic.twitter.com/3KPnM5AcPj
7. Lightness Illusion https://www.iflscience.com/brain/more-cool-optical-illuon-first-meets-eye/ …
We don't directly perceive how light or dark objects are; our perceptual systems make an educated "guess" based on the lightness or darkness of the surroundings.
HT @AkiyoshiKitaokapic.twitter.com/I872Of7vHN
8. Incredible footage of a helicopter going down way too fast
We don't directly perceive the size of objects; once again, our perceptual systems make an educated guess, based on pre-existing knowledge, the size of nearby objects, etc.pic.twitter.com/1NmfN5ZN2c
9. The Spinning Dancer https://en.wikipedia.org/wiki/Spinning_Dancer … If you look at the dancer on the left and the one in the middle, the one in the middle spins clockwise. If you look at the dancer on the *right* and the one in the middle, the one in the middle spins counterclockwise.pic.twitter.com/iHmfMW3ORO
10. All of these plates are flipped upside down... except one. Once you see that one, they'll all be right-side up.
...and once that happens, you probably won't be able to see them upside down anymore!
pic.twitter.com/Rb9hmyTowY
11. You can make the train change direction… https://reddit.com/r/gifs/comments/1e1x75/you_can_change_the_direction_of_the_train_if_you/ …pic.twitter.com/YTrQXKhnui
12. Now for an auditory illusion…
Does Grover say "Yes, yes, that's a f*ckin' excellent idea"? Or does he say "Yes, yes, that sounds like an excellent idea"?
You can hear it either way, depending on which option you hold in mind...
pic.twitter.com/bW01C3kbxR
13. This one's awesome. Stare at the red dot on the woman's nose for 30 seconds, then look at an empty wall while blinking quickly... https://reddit.com/r/blackmagicfuckery/comments/7yhxce/stare_at_the_red_dot_on_her_nose_for_30_second/ …pic.twitter.com/TOupCXpma0
14. Amazing T-Rex Illusion https://www.youtube.com/watch?v=A4QcyW-qTUg … A great example of how expectations shape perception: The visual system is so determined to see faces as convex, rather than concave, that it's virtually impossible not to see the illusion – even when you know what's going on.pic.twitter.com/6FT9Fzhl49
Here's another auditory illusion for ya. Can you "hear" this GIF? Most people can, even though it's silent. In effect, the GIF induces a mild auditory hallucination… HT @atomicnappic.twitter.com/3qEmqxVgVn
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