What is Superconductivity

Chilled to extraordinary cold temperatures—colder than - 321 degrees fahrenheit—certain metals conduct electricity with absolutely no resistance.
The current can flow undiminished in a loop forever, entropy seemingly vanquished in 100% efficiency.
An electrical current consistd of electrons streaming through a medium towards a positive charge.
There are snags along the way.
The conductive medium is like a lattice of atoms that may have irregularities and that vibrates with the energy of heat.
What's more, the atoms in a lattice, having given up loose electrons to the stream, are now positivey charged and attract the electrons tumbling past.
Akin to the friction that stops a sliding object, these snags result in loss of electrical energy.
Resistance typically diminishes as the conductive material's temperature drops. But super conductivity is different; when susceptable materials reach a critical cold threshold, reresistance abruptly vanishes.
To rush toward their destination with utmost efficiency, the streaming electrons organise themselves into pairs.
As one electron passes near the positively charged atoms of the lattice, the atoms bend inward toward the electron, temporarily increasing the positive charge around it.
This creates a weak attraction between the electron and the one just behind it, and they are drawn together through the lattice. Locked together, the electron simply ride roughshod over the lattice, losing no energy.
Because heat energy readily breaks them apart, such unusual pairings of electrons form only at critical cold threshold—the tipping point for superconductivity.