An unknot (also known as the trivial knot) can be drawn with any number of crossings. Any possible manipulation of a knot diagram that does not fundamentally change the knot can be achieved by a ...

Imperial’s Professor Sir John Pendry, FRS, was awarded the Royal Society’s oldest medal, the Copley Medal, this past August. The Copley Medal recognizes “sustained, outstanding achievements in any ...

Everything around us is built from sets of chemical elements. From the air we breathe to the jewelry we wear. All of these elements can be found on the periodic table that we’ve all had a chance to ...

The bold question-askers at What If explore what building a full-scale model of the periodic table would reveal.