facts and tips 52
it is estimated that there are over 1,000,000,000,000,000 connection in the human brain
![](https://img.wattpad.com/cover/73782080-288-k739795.jpg)
Facts and tips 52
facts and tips 52
it is estimated that there are over 1,000,000,000,000,000 connection in the human brain
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Amazing Facts and Tips :)
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facts and tips 52
it is estimated that there are over 1,000,000,000,000,000 connection in the human brain