On the first day of advent we bring you the most important cat in the history of science: Schrödinger's cat!

In this busy time why not put your feet up and learn some maths in just a few minutes with this year's Plus advent calendar. Now what's behind today's door?

If you don't feel like sitting around watching the telly this Christmas, then get creative with our advent calendar!

In this year's advent calendar we bring you some of our favourite books and other mathematical toys, so you can surprise your friends and family or, even better, yourself!

Is it cold outside? Yes! The fire warm? Yes! Snow on its way? Yes! Do we love Christmas? YES! Celebrate the countdown with the Plus advent calendar featuring our favourite bits of maths. Now, what's behind today's door...?

What's that we hear? Sleigh bells! What's that we smell? Chestnuts roasting on an open fire! What can that mean? Christmas is coming! Celebrate the countdown with the Plus advent calendar featuring our favourite mathematical moments from 2012. Now, what's behind today's door...?