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New series following people who push their bodies to the limit, beginning with a look at how a lifeguard's sight has improved, allowing them to spot a drowning person in a crowd
The properties of the human nervous system, which carries information around the body at more than 200mph, controlling pain, reactions to danger and co-ordination of movement
The capabilities of the human brain, including how it copes with a lack of food. The programme also explores why restricting calories can help combat ageing
The human body has engineered itself for strength, power and endurance. We discover how our bodies can perform amazing feats of endurance and strength.