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…

NASA: there is water on Mars

Until 3 billion years ago, Mars was a wet planet much like our own. It had land, an extensive atmosphere…

Meet our newest ancient ancestor!

In an exciting paper published today, palaeo-anthropologist Lee Berger and his team from the University of Witwatersrand in Johannesburg, South Africa,…