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 does ice float?

This question was asked by Jacqui from West Sussex, UK.  If you drop an ice cube into a glass of…

What is the Goldilocks zone?

Most children know the story of Goldilocks and the Three Bears; a little girl breaks into a house, finds fault…