Quantum levitation: super-cooled metals let off magnetic fields, so when metal disks are dipped in liquid nitrogen the will levitate and follow a magnetic track. Even if it’s upside down! This demonstration was run by Boaz Almog, from Tel Aviv University, and was a popular stop at the World Science Festival in Brooklyn. Obviously there is a ton of practical uses, like more efficient trains. But we are all really just hoping for hoverboards, aren’t we?