YOU might remember learning about symmetry at school. Maybe a teacher showed you a snowflake’s six-fold symmetry and you marvelled at how it looked the same no matter how you rotated it. Well, it ...

Is there a term for the shape shown above: a smooth, continuous curve with three axes of symmetry? And if anyone could share the equation for this curve, I would be very grateful. The plate appears to ...

I SHOULD like to offer two comments on Stannard's 1 recent interesting postulate that there exists a counter-world to compensate for the asymmetries of nature that we find in our own world. The first ...