Not even sleep stops the brain

EVEN when we are asleep our brains never switch off - they are always working, learning, sorting and storing information and upgrading, as much as they are able.

Computers, on the other hand, do not work at all when they are switched off.

If you want to upgrade a computer, you have to add some new hardware to it. -

thekidswindow.co.uk; thinkquest.com; dailymail.co.uk

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