The Human Body

Why does hair go curly when wet? © Getty Images

What makes hair go curly when it’s wet?

Are some things funny to all cultures? © Getty Images

Are some things funny to all cultures?

Is eating red grapes as good for you as drinking red wine? © iStock

Is eating red grapes as good for you as drinking red wine?

Who would die of starvation first., a fat person or a thin person? © Getty Images

Who would die first of starvation – a fat or a thin person?

Why do they sterilise lethal injection needles? © iStock

Why do they sterilise lethal injection needles?

Does the mouth have any natural resistance to plaque? © Getty Images

Does the mouth have any natural resistance to plaque?

Is there any part of the body that doesn't have blood vessels? © Getty Images

Is there any part of the body that doesn’t have blood vessels?

Is chloroform still used to knock people out? © iStock

Is chloroform still used to knock people out?

How much energy does thinking use? © Getty Images

How much energy does thinking use?

How did people deal with pain before anaesthetics? © Getty Images

How did people deal with pain before anaesthetics?

Can a smell wake you up? © iStock

Can a smell wake you up?

Why do some humans have a cast iron stomach? © Getty Images

Why do only some people have ‘cast-iron stomachs’?

Is it safe to eat yoghurt after the best before date? © Getty Images

Is it safe to eat yoghurt past its best-before date?

Are food cravings ever targeted at the nutrients we actually need? © iStock

Are food cravings ever targeted at the nutrients we actually need?

What is the blood-brain barrier? © Getty Images

What is the blood-brain barrier?