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Others Found
Do Crosswords Work?
Many people believe that doing crossword puzzles can keep the brain sharp, and even prevent Alzheimer’s. ...But it’s probably not
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Brain Facts
Babies Lose Half their Neurons at Birth It is estimated that a baby loses about half their neurons before they
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Motion Ambiguity
...Although they "fool the eyes," optical illusions are testaments to the strengths, rather than the weaknesses, of our visual system.
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Missing Letters

Count the "f"s in this passage

How many did you count?
There are actually 6 “f”s, but most people only count 3. Why? It seems that the brain has trouble correctly processing the word of. The letter “f” usually makes the /f/ sound, like in fox. In the word of, though, it makes the /v/ sound. As a result, the brain overlooks the word of as it scans for the sound of /f/.