The following puzzle was created by National Geographic for a children's show called "Brain Games." It shows a picture of a bus that is perfectly symmetrical on both sides.


The question posed to the audience is, once the bus starts moving, which way will it go?

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Did you figure it out? The absence of a door in the image indicates that it must be on the other side. In the US, that means the front of the bus in on the left. 
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A study done by University College London and University of London Birbeck offers an explanation as to why children are quicker at solving the puzzle than adults, reports Today. Children, more so than adults, take into account their visual cues more strongly than other cues.

According to the Wall Street Journal, this isn't the only way children are different.  Geared for exploration, they might pick up on alternatives faster than an adult would.