Science fiction minerals, ‘Little Guide to Non-existent Minerals’ to make you fall in love with geology
Carlos Pina, a crystallography professor at the Complutense University of Madrid (UCM), was "dislodged" when in one of his practical classes a student asked him about Superman's kryptonite. At first, I didn't know if he was kidding her, but they had been in the course for two months and rarely had the classroom been so attentive.