Play with our applets to explore the conic sections and their different definitions.
A 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?
A little trig helps to find the relative distance to the Sun and Moon.
Why there is a limit to how much better computer chips can get and what it's got to do with black holes.
An impossible equation, two tragic heroes and the mathematical study of symmetry.