Sleep plays an essential role in our lives, and we need it to function properly. Some of our brains' most important work takes place as we get some rest. Dr Chris van Tulleken finds out how much sleep can change his memory.

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Secrets of the Human Body (2017)
The human body is the most sophisticated organism on earth. It's a scientific marvel and much about it remains a mystery. Secrets of the Human Body uses cutting-edge graphics to effectively peel back the skin and reveal the surprisingly beautiful biological processes that keep us alive.

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