In 1933, Walther Meissner discovered that in a superconductor that has been cooled down as much as possible, the magnetic field will be expelled. This phenomenon has been dubbed the Meissner effect.
If a regular magnet is placed on aluminum (or any other superconductor) that is then cooled using liquid nitrogen, the magnet will levitate and hang in the air, as it will “see” its own magnetic field of the same polarity expelled from the cooled aluminum, and the same sides of magnets repel each other.
The 10 weirdest quantum physics facts
1. Wave function collapse
2. Heisenberg uncertainty principle
3. Meissner effect
5. Quantum tunneling
6. Quantum entanglement
7. Quantum Zeno effect
8. Delayed choice quantum eraser
9. Quantum superposition
10. Quantum Cheshire Cat
The Phase. Shattering the Illusion of Reality
by Michael Raduga