Making Two Tribes fairerIn the TV game show Two Tribes teams can have unequal sizes. Is that fair?
Folding fractionsFolding a piece of paper in half might be easy, but what about into thirds, fifths, or thirteenths? Here is a simple and exact way for fold any fraction, all thanks to the maths of triangles.
Can a mathematical model of zombies' movements allow the human race to survive impending doom?
Who's looking at you?Observers are, of course, vital in physics: we test our theories by comparing them to our observations. But in cosmology, as Jim Hartle explains, we could be one of many possible observers in the Universe and knowing which one we are is vital in testing our theories.
Two-faced conic sectionsPlay with our applets to explore the conic sections and their different definitions.
Steady on, EinsteinTo celebrate the release of more English translations of Einstein's papers, we revisit one of his previously unknown models of the Universe.
From dust to usWhere planets are born is not necessarily where they will stay…
Introducing the Klein bottleA Klein bottle can't hold any liquid because it doesn't have an inside. How do you construct this strange thing and why would you want to?