The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C. (Google, copy-paste). So we're now talking about superconductors tha

The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C. (Google, copy-paste). So we're now talking about superconductors that could exist in certain conditions on the earth without human intervention. That's pretty amazing. Now we just need to figure out how to make it work somewhere a bit warmer.