it makes me mad that people actually think calling the room-temperature superconductor they're mining in avatar "unobtanium" is lazy when if anything's going to qualify for that name, it's going to be a room-temperature superconductor. closest runner-up is probably gonna be a material with tensile properties suitable for an earth space elevator tether
also I can't stress enough that materials scientists aren't exactly the most imaginative when it comes to names
