[idiotsecant]

Its not at all clear that room temperature superconductors are impossible, it's a materials problem. If someone was to find one that is probably how they would do it - testing materials for some other property and finding it accidentally.

[sandworm101]

Room temperature is totally possible. Room temperature AND room pressure is another story. Superconductivity acrose a couple nanometers inside a diamond anvil is not very useful even if at "room" temperatures.