look completely ordinary. You can search through it repeatedly and still feel as though there is nothing unusual to find.
Then, suddenly, a familiar shape appears.
Once your brain recognizes it, it can become surprisingly difficult to understand how you missed it in the first place.
This happens because perception isn’t simply about receiving information through your eyes. Your brain also plays a major role in interpreting that information.
The same lines can mean one thing when you see them as part of a tree and something completely different when
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