How do glasses improve your vision?

Some people wear glasses because they’re long-sighted (hyperopic), which means that they can see distant objects clearly but find it…

Why are tattoos permanent?

I bet you know someone with a tattoo. You may even have one yourself. Humans have been tattooing themselves and…

How does local anaesthetic work?

This question was asked by Albatross class at Swiss Gardens Primary School, Shoreham, UK. ‘Anaesthetic’ (pronounced¬†ann-ass-thet-ik) comes from a Greek…

Fatness, thinness, fitness and health

Modern society seems to be obsessed with the way people look, particularly whether they’re fat, thin or in between. So…