Trump — once again — will rein in the nation's law protecting waterways. At stake are seasonal streams and ponds. The move is ...

In Fresno County, the zigzagging Friant-Kern Canal, diverting water from Millerton Lake, snakes past small villages as it ...

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 ...

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