Today, on 14 April, we celebrate World Quantum Day – an international initiative launched by scientists from more than 65 countries to promote public understanding of quantum science and technology worldwide. The date – “4.14” -- marks the rounded first 3 digits of Planck’s constant, a crucial value in quantum mechanics that is used to describe the behaviour of particles at the subatomic level. Officially launched in 2022, World Quantum Day already comprises more than 300 events held in 193 cities in 44 countries on 5 continents in 17 different languages. Scientists, engineers, e...