Maps are wonderful to picture our planet Earth! But they are also deeply misleading… All of them. And there’s a fundamental theorem behind this!

Can you glue opposite edges of a square? Relativity 7

Why do soccer balls have the shape they have? Relativity 8

What’s a straight line? Curved-space geometry | Science4All 10

What’s the geometry of my underpants? Hyperbolic Geometry | Science4All 11

Could space be finite? Poincare conjecture | Science4All 21