A tessellation is a repeating pattern of polygons that covers a plane with no gaps or overlaps. What kind of tessellations can you make out of regular polygons? What shapes tessellate? If shapes can ...

Resoling boots means replacing the worn outsole, and sometimes the heel and midsole, so the uppers can keep going. When it is ...

Feb. 2, 2026 As demand for critical metals grows, scientists have taken a rare, close look at life on the deep Pacific seabed where mining may soon begin. Over five years and 160 days at sea, ...