The fall of antimatter

Although the gravitational interaction between matter and antimatter has been the subject of theoretical speculation since the discovery of the latter in 1928, only a few weeks ago the ALPHA experiment at CERN was able to observe, for the first time, the effects of gravity on antimatter atoms, namely on anti-hydrogen. After an introduction of the concept of antimatter, along with its still unresolved mysteries, details about how anti-hydrogen is produced at the antimatter factory at CERN will be given. Finally, the measurement of the acceleration of gravity of anti-hydrogen atoms falling in the Earth’s gravitational field will be presented.