Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. Symmetry also has an aesthetic meaning, although this is ...

A complex form of mathematical symmetry linked to string theory has been glimpsed in the real world for the first time, in laboratory experiments on exotic crystals. Mathematicians discovered a ...

3. In the following figures, the mirror line (i.e., the line of symmetry) is given as a dotted line. Complete each figure performing reflection in the dotted (mirror) line. (You might perhaps place a ...

A shape has a line of symmetry when the folded part sits perfectly on top with all edges matching. The number of lines of symmetry in a regular polygon is equal to the number of sides. A shape has ...

Forbes contributors publish independent expert analyses and insights. I write about the philosophy and ethics of science and technology. If you work up from first principles, much of what we ...

The Change Champs are a team of children who like to learn about the world around them. In each video, the Change Champs meet an expert who sets them an exciting challenge. Hannah and Maya arrive at ...