While meteorological spring is already underway, astronomical spring doesn’t begin until the early morning of March 20, ...

A 2D shape is symmetrical if a line can be drawn through it so that either side of the line looks exactly the same. The line is called a line of symmetry. This is sometimes called a 'mirror line ...

Today's grid has left-right mirror symmetry. That is, it is symmetrical around a vertical line down the center of the puzzle. Mirror symmetry often results in some interesting grid patterns.

A 2D shape is symmetrical if you can draw a line through it and it looks exactly the same either side. This line is called a line of symmetry. Oh that rather smug expression tells me that square ...