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31 August 2016

We all need to sleep regularly

We all need to sleep regularly. But why? One popular scientific theory has it that sleep evolved to allow connections (or synapses) between neurons in the brain to be pruned down, thus making room for the myriad of brand new memories that will accumulate during the following day. The idea received support recently when US scientists found that synapses in the brains of mice were 18 percent smaller after a period of sleep than they were before. Think of it as a natural and necessary process of mental housekeeping.

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