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This set of puzzles, provided by the Association for Science Education (ASE), is part of the SYCD: Science Year theme Who am I? collection.

Suck it and see - Is it true that you become drunk faster if you drink through a straw?

Pain in the leg - Why do muscles hurt more the second day after exercise?

Five live - Why do we have five fingers on each hand and five toes on each foot?

Flat-footed - The human foot evolved to walk unaided. So why are shoes designed with heels that are thicker than the rest of the sole?

Bodily breeding - How many different species live on or in the average human being and what is there total population?

Pointless - Why do men have nipples?

Crinkle tips - Why does your skin become wrinkled after a long spell in water?

Night growth - Why are we taller in the morning than at night?

Itching power - How does scratching stop itching?

Sex secret - Why do women live longer than men?

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