Cosmologists are increasingly entertaining a radical possibility: that the cosmos might fold back on itself so that, on the ...

Tessellations aren’t just eye-catching patterns—they can be used to crack complex mathematical problems. By repeatedly reflecting shapes to tile a surface, researchers uncovered a method that links ...

Translations and reflections are examples of transformations of shapes. If a shape is transformed, its position and/or size is changed. Translation is when a shape slides across, up, down or ...