A brief introduction to bits and why they're not the same as 0s and 1s.

How do you write numbers as string of 0s and 1s?

In the game of Nim one player always has a winning strategy — it depends on an unusual way of adding numbers.

How does a computer understand the colours to be displayed on the monitor's screen? It's all about red, green and blue and numbers written in a special way.

It's International Year of Astronomy and all eyes are on Galileo Galilei, whose astronomical observations 400 years ago revolutionised our understanding of the Universe. But few people know that Galileo wasn't the first to build a telescope and turn it on the stars. That honour falls to a little-known mathematician called Thomas Harriot, who excelled in many other ways too. Anna Faherty takes us on a tour of his work.