Quantum theory governs the behaviour of fundamental particles, atoms, and molecules, i.e., of nature at the smallest scale. Intriguingly and counter-intuitively, quantum systems can simultaneously ‘be’ in combinations of physical states that are mutually incompatible according to classical physics. Examples we can name are the... click to read more

Magic squares have fascinated people for centuries. A magic square is a grid of numbers such that every column and row sum up to the same number, called the “magic constant”. For example, a magic square can be seen on the façade of the Sagrada... click to read more

To a classical physicist, there is no fundamental limit to how well you can measure something. A classical object, for example, always exists in a well-defined position; if you want to know that position with better accuracy, you simply build a better microscope. The story... click to read more