advent calendar 2010

The end of the year (as well as a Plus birthday) put us in the mood to reflect on mathematical milestones. Celebrate with us behind door number 3...

When you saw us outside building snow-mathematicians and throwing snowballs we weren't just larking about, honestly! We were actually conducting in-depth research into symmetry and trajectories — and here our results, behind door number 2...

Inspired by the Science in School Advent Calendar, here is the 1st door to open.... I wonder what is inside?